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Title: Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $$\sqrt{s} =$$ 7 TeV

Abstract

The decorrelation in the azimuthal angle between the most forward and the most backward jets (Mueller-Navelet jets) is measured in data collected in pp collisions with the CMS detector at the LHC at $$\sqrt{s} =$$ 7 TeV. The measurement is presented in the form of distributions of azimuthal-angle differences, $$\Delta\phi$$, between the Mueller-Navelet jets, the average cosines of $$(\pi-\Delta\phi)$$, $$2(\pi-\Delta\phi)$$, and $$3(\pi-\Delta\phi)$$, and ratios of these cosines. The jets are required to have transverse momenta, $$p_{\mathrm{T}}$$, in excess of 35 GeV and rapidities, $| y |$, of less than 4.7. The results are presented as a function of the rapidity separation, $$\Delta{y}$$, between the Mueller-Navelet jets, reaching $$\Delta{y}$$ up to 9.4 for the first time. Lastly, the results are compared to predictions of various Monte Carlo event generators and to analytical predictions based on the DGLAP and BFKL parton evolution schemes.

Authors:
 [1]
  1. Yerevan Physics Institute, Yerevan (Armenia). et al.
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CMS Collaboration
OSTI Identifier:
1244436
Report Number(s):
FERMILAB-PUB-16-022-CMS; CMS-FSQ-12-002; CERN-PH-EP-2015-309; arXiv:1601.06713
Journal ID: ISSN 1029-8479; 1416827
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Hadron-Hadron scattering (experiments); proton-proton scattering; forward physics; jets; particle correlations and fluctuations

Citation Formats

Khachatryan, Vardan. Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $\sqrt{s} =$ 7 TeV. United States: N. p., 2016. Web. doi:10.1007/JHEP08(2016)139.
Khachatryan, Vardan. Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $\sqrt{s} =$ 7 TeV. United States. doi:10.1007/JHEP08(2016)139.
Khachatryan, Vardan. Wed . "Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $\sqrt{s} =$ 7 TeV". United States. doi:10.1007/JHEP08(2016)139. https://www.osti.gov/servlets/purl/1244436.
@article{osti_1244436,
title = {Azimuthal decorrelation of jets widely separated in rapidity in pp collisions at $\sqrt{s} =$ 7 TeV},
author = {Khachatryan, Vardan},
abstractNote = {The decorrelation in the azimuthal angle between the most forward and the most backward jets (Mueller-Navelet jets) is measured in data collected in pp collisions with the CMS detector at the LHC at $\sqrt{s} =$ 7 TeV. The measurement is presented in the form of distributions of azimuthal-angle differences, $\Delta\phi$, between the Mueller-Navelet jets, the average cosines of $(\pi-\Delta\phi)$, $2(\pi-\Delta\phi)$, and $3(\pi-\Delta\phi)$, and ratios of these cosines. The jets are required to have transverse momenta, $p_{\mathrm{T}}$, in excess of 35 GeV and rapidities, $| y |$, of less than 4.7. The results are presented as a function of the rapidity separation, $\Delta{y}$, between the Mueller-Navelet jets, reaching $\Delta{y}$ up to 9.4 for the first time. Lastly, the results are compared to predictions of various Monte Carlo event generators and to analytical predictions based on the DGLAP and BFKL parton evolution schemes.},
doi = {10.1007/JHEP08(2016)139},
journal = {Journal of High Energy Physics (Online)},
number = ,
volume = 2016,
place = {United States},
year = {2016},
month = {8}
}

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Figures / Tables:

Table 1 Table 1: Systematic and statistical uncertainties (%) of the observables measured in this work.

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font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2008-11-20">November 2008</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Bähr, Manuel; Gieseke, Stefan; Gigg, Martyn A.</span> </li> <li> The European Physical Journal C, Vol. 58, Issue 4</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1140/epjc/s10052-008-0798-9" class="text-muted" target="_blank" rel="noopener noreferrer">10.1140/epjc/s10052-008-0798-9<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1016/0550-3213(94)90565-7" target="_blank" rel="noopener noreferrer" class="name">Production of jet pairs at large relative rapidity in hadron-hadron collisions as a probe of the perturbative pomeron<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="1994-07-01">July 1994</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Stirling, W. J.</span> </li> <li> Nuclear Physics B, Vol. 423, Issue 1</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1016/0550-3213(94)90565-7" class="text-muted" target="_blank" rel="noopener noreferrer">10.1016/0550-3213(94)90565-7<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1088/1748-0221/9/10/P10009" target="_blank" rel="noopener noreferrer" class="name">Description and performance of track and primary-vertex reconstruction with the CMS tracker<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2014-10-01">October 2014</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Collaboration, The CMS</span> </li> <li> Journal of Instrumentation, Vol. 9, Issue 10</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1088/1748-0221/9/10/P10009" class="text-muted" target="_blank" rel="noopener noreferrer">10.1088/1748-0221/9/10/P10009<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1088/1748-0221/6/11/P11002" target="_blank" rel="noopener noreferrer" class="name">Determination of jet energy calibration and transverse momentum resolution in CMS<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2011-11-01">November 2011</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> collaboration, The CMS</span> </li> <li> Journal of Instrumentation, Vol. 6, Issue 11</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1088/1748-0221/6/11/P11002" class="text-muted" target="_blank" rel="noopener noreferrer">10.1088/1748-0221/6/11/P11002<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> <div> <h2 class="title" style="margin-bottom:0;" data-apporder=""> <a href="https://doi.org/10.1088/1748-0221/9/06/P06009" target="_blank" rel="noopener noreferrer" class="name">Alignment of the CMS tracker with LHC and cosmic ray data<span class="fa fa-external-link" aria-hidden="true"></span></a> <small class="text-muted" style="text-transform:uppercase; font-size:0.75rem;"><br/> <span class="type">journal</span>, <span class="date" data-date="2014-06-01">June 2014</span></small> </h2> <ul class="small references-list" style="list-style-type:none; margin-top: 0.5em; padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> collaboration, The CMS</span> </li> <li> Journal of Instrumentation, Vol. 9, Issue 06</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.1088/1748-0221/9/06/P06009" class="text-muted" target="_blank" rel="noopener noreferrer">10.1088/1748-0221/9/06/P06009<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-tab="biblio-references" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All References</a></li> <li class="small" style="margin-left:.75em; 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padding-left: 0; line-height:1.8em;"> <li> <span style="color:#5C7B2D;"> Khachatryan, Vardan; Sirunyan, Albert M.; Tumasyan, Armen</span> </li> <li> RWTH Aachen University</li> <li> <span class="text-muted related-url">DOI: <a href="https://doi.org/10.18154/rwth-2017-07648" class="text-muted" target="_blank" rel="noopener noreferrer">10.18154/rwth-2017-07648<span class="fa fa-external-link" aria-hidden="true"></span></a></span> </li> </ul> <hr/> </div> </div> <div class="pagination-container small"> <a class="pure-button prev page" href="#" rel="prev"><span class="fa fa-angle-left"></span></a><ul class="pagination d-inline-block" style="padding-left:.2em;"></ul><a class="pure-button next page" href="#" rel="next"><span class="fa fa-angle-right"></span></a> </div> </div> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a href="" class="reference-type-filter tab-nav" data-filter="type" data-pattern="*"><span class="fa fa-angle-right"></span> All Cited By</a></li> <li class="small" style="margin-left:.75em; text-transform:capitalize;"><a href="" class="reference-type-filter tab-nav" data-filter="type" data-pattern="text"><span class="fa fa-angle-right"></span> text<small class="text-muted"> (1)</small></a></li> </ul> <div style="margin-top:2em;"> <form class="pure-form small text-muted citation-search"> <label for="citation-search-text" class="sr-only">Search</label> <input class="search form-control pure-input-1" id="citation-search-text" placeholder="Search" style="margin-bottom:10px;" /> <fieldset> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="name" style="position:relative;top:2px;" id="citation-search-sort-name"><label for="citation-search-sort-name" style="margin-left: .3em;">Sort by title</label></div> <div style="margin-left:1em; font-weight:normal; line-height: 1.6em;"><input type="radio" class="sort" name="references-sort" data-sort="date" data-order="desc" style="position:relative;top:2px;" id="citation-search-sort-date"><label for="citation-search-sort-date" style="margin-left: .3em;">Sort by date</label></div> </fieldset> <div class="text-left" style="margin-left:1em;"> <a href="" class="filter-clear clearfix" title="Clear filter / sort" style="font-weight:normal; float:none;">[ × clear filter / sort ]</a> </div> </form> </div> </div> </div> </section> <section id="biblio-images" class="tab-content tab-content-sec osti-curated" data-tab="biblio"> <div class="row"> <div class="col-sm-9 order-sm-9"> <div class="padding"> <p class="lead text-muted" style="font-size: 18px; margin-top:0px;"><span id="image-type-label">Figures / Tables</span> found in this record:</p> <div class="list clearfix"> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 8" data-order="1" data-imgid="1244436-img75721" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0075721.png" data-title="Table 1" data-desc="Systematic and statistical uncertainties (%) of the observables measured in this work." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img75721" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img75721"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Table 1 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 8)</small><span class="d-none type">table</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0075721.png'); background-repeat:no-repeat; background-size:contain; background-position-x: center; width: 100%; height: 175px; margin-top:.5em; "> </div> </div> </a> </div> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 11" data-order="2" data-imgid="1244436-img20115" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0020115.png" data-title="Figure 1" data-desc="Left: distributions of the azimuthal-angle difference, ∆φ, between MN jets in the rapidity intervals ∆y < 3.0 (top row), 3.0 < ∆y < 6.0 (centre row), and 6.0 < ∆y < 9.4 (bottom row). Right: ratios of predictions to the data in the corresponding rapidity intervals. The data (points) are plotted with experimental statistical (systematic) uncertainties indicated by the error bars (the shaded band), and compared to predictions from the LL DGLAP-based MC generators PYTHIA 6, PYTHIA 8, HERWIG++, and SHERPA, and to the LL BFKL-motivated MC generator HEJ with hadronisation performed with ARIADNE (solid line)." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img20115" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img20115"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Figure 1 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 11)</small><span class="d-none type">figure</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0020115.png'); background-repeat:no-repeat; background-size:contain; background-position-x: center; width: 100%; height: 175px; margin-top:.5em; "> </div> </div> </a> </div> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 12" data-order="3" data-imgid="1244436-img20119" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0020119.png" data-title="Figure 2" data-desc="Left: average 〈cos(n(π−∆φ))〉(n = 1, 2, 3) as a function of ∆y compared to LL DGLAP MC generators. In addition, the predictions of the NLO generator powheg interfaced with the LL DGLAP generators PYTHIA 6 and PYTHIA 8 are shown. Right: comparison of the data to the MC generator sherpa with parton matrix elements matched to a LL DGLAP parton shower, to the LL BFKL inspired generator hej with hadronisation by ARIADNE, and to analytical NLL BFKL calculations at the parton level (4.0 < ∆y < 9.4)." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img20119" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img20119"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Figure 2 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 12)</small><span class="d-none type">figure</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0020119.png'); background-repeat:no-repeat; background-size:contain; background-position-x: center; width: 100%; height: 175px; margin-top:.5em; "> </div> </div> </a> </div> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 13" data-order="4" data-imgid="1244436-img20118" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0020118.png" data-title="Figure 3" data-desc="Left: the measured ratios C2/C1 (top row) and C3/C2 (bottom row) as a function of rapidity difference ∆y are compared to LL DGLAP parton shower generators and to the NLO generator POWHEG interfaced with PYTHIA 6 and PYTHIA 8. Right: comparison of the ratios to the MC generator SHERPA with parton matrix element matched to a LL DGLAP parton shower, to the LL BFKL-inspired generator hej with hadronisation by ARIADNE, and to analytical NLL BFKL calculations at the parton level." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img20118" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img20118"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Figure 3 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 13)</small><span class="d-none type">figure</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0020118.png'); background-repeat:no-repeat; background-size:contain; background-position-x: center; width: 100%; height: 175px; margin-top:.5em; "> </div> </div> </a> </div> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 14" data-order="5" data-imgid="1244436-img20116" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0020116.png" data-title="Figure 4" data-desc="Average 〈cos (π −∆φ)〉, 〈cos 2(π −∆φ)〉 and 〈cos 3(π −∆φ)〉 compared to PYTHIA 6 with and without MPI." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img20116" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img20116"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Figure 4 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 14)</small><span class="d-none type">figure</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0020116.png'); background-repeat:no-repeat; background-size:contain; background-position-x: center; width: 100%; height: 175px; margin-top:.5em; "> </div> </div> </a> </div> <div class="col-sm-3 float-left biblio-image-tile" data-apporder="p. 14" data-order="6" data-imgid="1244436-img20117" data-imgsrc="/biblio/1244436/image/000/279/0002793/3/0020117.png" data-title="Figure 5" data-desc="Measured ratios C2/C1 (left) and C3/C2 (right) compared to PYTHIA 8 with and without MPI." data-ostiid="1244436" style="padding-bottom: 2em; border-bottom: 1px solid #ddd;"> <a href="#img" class="biblio-image-tile-a ga-click-event" data-imgid="1244436-img20117" data-lityx data-category="Extracted Images" data-label="biblio: image thumbnail" data-value="1244436-img20117"> <div style=" padding: .5em; border: 1px solid #eee; background-color: #fff; "> <small class="name">Figure 5 <small class="pull-right" style="margin-right: .5em;color:#999;top: 3px;position: relative;">(p. 14)</small><span class="d-none type">figure</span></small> <div style=" background-image:url('/biblio/1244436/image/000/279/0002793/3/t0020117.png'); 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margin-top:0px;">Similar Records in DOE PAGES and OSTI.GOV collections:</p> <aside> <ul class="item-list" itemscope itemtype="http://schema.org/ItemList" style="padding-left:0; list-style-type: none;"> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="0" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/21259914-azimuthal-decorrelation-mueller-navelet-jets-tevatron-lhc" itemprop="url">Azimuthal decorrelation of Mueller-Navelet jets at the Tevatron and the LHC</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Marquet, C</span> ; <span class="author">Royon, C</span> ; <span class="author">DAPNIA/Service de physique des particules, CEA/Saclay, 91191 Gif-sur-Yvette cedex</span> <span class="text-muted pubdata"> - Physical Review. D, Particles Fields</span> </span> </div> <div class="abstract">We study the production of Mueller-Navelet jets at hadron colliders in the Balitsky-Fadin-Kuraev-Lipatov framework. We show that a measurement of the relative azimuthal angle {delta}{phi} between the jets can provide a good testing ground for corrections due to next-leading logarithms (NLL). Besides the well-known azimuthal decorrelation with increasing rapidity interval {delta}{eta} between the jets, we propose to also measure this effect as a function of R=k{sub 2}/k{sub 1}, the ratio between the jet transverse momenta. Using renormalization-group improved NLL kernel, we obtain predictions for d{sigma}/d{delta}{eta}dRd{delta}{phi}. We analyze NLL-scheme and renormalization-scale uncertainties, and energy-momentum conservation effects, in order to motivate a<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> measurement at the Tevatron and the LHC.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1103/PHYSREVD.79.034028" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="21259914" data-product-type="Journal Article" data-product-subtype="" >10.1103/PHYSREVD.79.034028</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="2" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1336418-suppression-azimuthal-anisotropy-prompt-nonprompt-mathrm-psi-production-pbpb-collisions-sqrt-s_-text-nn-tev" itemprop="url">Suppression and azimuthal anisotropy of prompt and nonprompt $${\mathrm{J}}/\psi $$ production in PbPb collisions at $$\sqrt{{s_{_{\text {NN}}}}} =2.76$$ TeV</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Khachatryan, V.</span> ; <span class="author">Sirunyan, A. M.</span> ; <span class="author">Tumasyan, A.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - European Physical Journal. C, Particles and Fields</span> </span> </div> <div class="abstract">The nuclear modification factor<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> $${R_{\mathrm{AA}}} $$ and the azimuthal anisotropy coefficient $${v_{2}} $$ of prompt and nonprompt (i.e. those from decays of b hadrons) $$\mathrm{J}/\psi$$ mesons, measured from PbPb and pp collisions at $$\sqrt{s_{\mathrm{NN}}} = $$ 2.76 TeV at the LHC, are reported. The results are presented in several event centrality intervals and several kinematic regions, for transverse momenta $$p_{\mathrm{T}} > $$ 6.5 GeV/$c$ and rapidity $$| {y} | < $$ 2.4, extending down to $$p_{\mathrm{T}}= $$ 3 GeV/$c$ in the 1.6 $$ < |{y}| < $$ 2.4 range. The $${v_{2}} $$ of prompt $$\mathrm{J}/\psi$$ is found to be nonzero and constant over the full kinematic range studied, while the measured $${v_{2}} $$ of nonprompt $$\mathrm{J}/\psi$$ is consistent with zero. The $${R_{\mathrm{AA}}} $$of prompt $$\mathrm{J}/\psi$$ exhibits a suppression that increases with centrality but does not vary as a function of either $y$ or $$p_{\mathrm{T}}$$ in the fiducial range. The nonprompt $$\mathrm{J}/\psi {R_{\mathrm{AA}}} $$ shows a suppression which becomes stronger as rapidity or $$ p_{\mathrm{T}}$$ increase. Furthermore, the $${v_{2}} $$ and nuclear suppression of open and hidden charm, and of open charm and beauty, are compared.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 5<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1140/epjc/s10052-017-4781-1" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1336418" data-product-type="Journal Article" data-product-subtype="AM" >10.1140/epjc/s10052-017-4781-1</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1336418" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1336418" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="3" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/biblio/573009-azimuthal-decorrelation-jets-widely-separated-rapidity" itemprop="url">The azimuthal decorrelation of jets widely separated in rapidity</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Conference</small><span class="authors"> <span class="author">Abbott, B</span> ; <span class="author">D0 Collaboration</span> <span class="text-muted pubdata"></span> </span> </div> <div class="abstract">We study the azimuthal decorrelation between jets with pseudorapidity separation up to six units. The data were accumulated using the D0 detector during the 1994-1995 collider run of the Fermilab Tevatron at {radical}s = 1.8 TeV. The data are compared to two parton shower Monte Carlos (HERWIG and PYTHIA) and an analytical prediction using the leading logarithmic BFKL resummation. The final state jets as predicted by the parton showering Monte Carlos describe the data over the entire pseudorapidity range studied. The prediction based on the leading logarithmic BFKL resummation shows more decorrelation than the data as the rapidity interval increases.</div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/servlets/purl/573009" title="Link to document media" target="_blank" rel="noopener" data-ostiid="573009" data-product-type="Conference" data-product-subtype="" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="4" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1434951-ratios-dijet-production-cross-sections-function-absolute-difference-rapidity-between-jets-protonproton-collisions-sqrt-mathrm-tev" itemprop="url">Ratios of dijet production cross sections as a function of the absolute difference in rapidity between jets in proton–proton collisions at $$\sqrt{s} = 7\ \mathrm{TeV}$$</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Chatrchyan, S.</span> ; <span class="author">Khachatryan, V.</span> ; <span class="author">Sirunyan, A. M.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - European Physical Journal. C, Particles and Fields</span> </span> </div> <div class="abstract">A study of dijet production in proton-proton collisions was performed at sqrt(s) = 7 TeV for jets with pt > 35 GeV and abs(y) < 4.7 using data collected with the CMS detector at the LHC in 2010. Events with at least one pair of jets are denoted as 'inclusive'. Events with exactly one pair of jets are called 'exclusive'. The ratio of the cross section of all pairwise combinations of jets to the exclusive dijet cross section as a function of the rapidity difference between jets abs(Delta(y)) is measured for the first time up to abs(Delta(y)) = 9.2. The<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> ratio of the cross section for the pair consisting of the most forward and the most backward jet from the inclusive sample to the exclusive dijet cross section is also presented. The predictions of the Monte Carlo event generators PYTHIA6 and PYTHIA8 agree with the measurements. In both ratios the HERWIG++ generator exhibits a more pronounced rise versus abs(Delta(y)) than observed in the data. The BFKL-motivated generators CASCADE and HEJ+ARIADNE predict for these ratios a significantly stronger rise than observed.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 10<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1140/epjc/s10052-012-2216-6" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1434951" data-product-type="Journal Article" data-product-subtype="AM" >10.1140/epjc/s10052-012-2216-6</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1434951" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1434951" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> <li> <div class="article item document" itemprop="itemListElement" itemscope itemtype="http://schema.org/WebPage"><meta itemprop="position" content="5" /><div class="item-info"> <h2 class="title" itemprop="name headline"><a href="/pages/biblio/1415831-azimuthal-correlations-inclusive-jet-jet-jet-events-pp-collisions-sqrt-hbox-tev" itemprop="url">Azimuthal correlations for inclusive 2-jet, 3-jet, and 4-jet events in pp collisions at $$\sqrt{s}= 13~\hbox {TeV}$$</a></h2> <div class="metadata"> <small class="text-muted" style="text-transform:uppercase;display:block;line-height:2.5em;">Journal Article</small><span class="authors"> <span class="author">Sirunyan, A. M.</span> ; <span class="author">Tumasyan, A.</span> ; <span class="author">Adam, W.</span> ; <span class="author">...</span> <span class="text-muted pubdata"> - European Physical Journal. C, Particles and Fields</span> </span> </div> <div class="abstract">Azimuthal correlations between the two jets with the largest transverse momenta<a href='#' onclick='$(this).hide().next().show().next().show();return false;' style='margin-left:10px;'>more »</a><span style='display:none;'> $$ {p_{\mathrm{T}}} $$ in inclusive 2-, 3-, and 4-jet events are presented for several regions of the leading jet $$ {p_{\mathrm{T}}} $$ up to 4 TeV. For 3- and 4-jet scenarios, measurements of the minimum azimuthal angles between any two of the three or four leading $$ {p_{\mathrm{T}}} $$ jets are also presented. The analysis is based on data from proton-proton collisions collected by the CMS Collaboration at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$$^{-1}$$. Calculations based on leading-order matrix elements supplemented with parton showering and hadronization do not fully describe the data, so next-to-leading-order calculations matched with parton shower and hadronization models are needed to better describe the measured distributions. Furthermore, we show that azimuthal jet correlations are sensitive to details of the parton showering, hadronization, and multiparton interactions. Here, a next-to-leading-order calculation matched with parton showers in the MC@NLO method, as implemented in HERWIG 7, gives a better overall description of the measurements than the POWHEG method.</span><a href='#' onclick='$(this).hide().prev().hide().prev().show();return false;' style='margin-left:10px;display:none;'>« less</a></div><div class="metadata-links small clearfix text-muted" style="margin-top:15px;"> <span class="fa fa-book text-muted" aria-hidden="true"></span> Cited by 1<div class="pure-menu pure-menu-horizontal pull-right" style="width:unset;"> <ul class="pure-menu-list"> <li class="pure-menu-item"><span class="item-info-ftlink">DOI: <a class="misc doi-link " href="https://doi.org/10.1140/epjc/s10052-018-6033-4" target="_blank" rel="noopener" title="Link to document DOI" data-ostiid="1415831" data-product-type="Journal Article" data-product-subtype="AM" >10.1140/epjc/s10052-018-6033-4</a></span></li> <li class="pure-menu-item"><span class="item-info-ftlink"><a class="misc fulltext-link " href="/pages/servlets/purl/1415831" title="Link to document media" target="_blank" rel="noopener" data-ostiid="1415831" data-product-type="Journal Article" data-product-subtype="AM" >Full Text Available</a></span></li> </ul> </div> </div> </div> <div class="clearfix"></div> </div> </li> </ul> </aside> </div> </section> </div> <div class="col-sm-3 order-sm-3"> <ul class="nav nav-stacked"> <li class="active"><a class="tab-nav disabled" data-tab="related" style="color: #636c72 !important; opacity: 1;"><span class="fa fa-angle-right"></span> Similar Records</a></li> </ul> </div> </div> </section> </div></div> </div> </div> </section> <footer class="" style="background-color:#f9f9f9; /* padding-top: 0.5rem; */"> <div class="footer-minor"> <div class="container"> <hr class="footer-separator" /> <div class="text-center" style="margin-top:1.25rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list" id="footer-org-menu"> <li class="pure-menu-item"> <a href="https://energy.gov" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-us-doe-min" alt="U.S. Department of Energy" /> </a> </li> <li class="pure-menu-item"> <a href="https://www.energy.gov/science/office-science" target="_blank" rel="noopener noreferrer"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-office-of-science-min" alt="Office of Science" /> </a> </li> <li class="pure-menu-item"> <a href="/"> <img src="data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" class="sprite sprite-footer-osti-min" alt="Office of Scientific and Technical Information" /> </a> </li> </ul> </div> </div> <div class="text-center small" style="margin-top:0.5em;margin-bottom:2.0rem;"> <div class="pure-menu pure-menu-horizontal"> <ul class="pure-menu-list"> <li class="pure-menu-item"><a href="/disclaim" class="pure-menu-link"><span class="fa fa-institution"></span> Website Policies <span class="hidden-xs">/ Important Links</span></a></li> <li class="pure-menu-item"><a href="/pages/contact" class="pure-menu-link"><span class="fa fa-comments-o"></span> Contact Us</a></li> <li class="d-block d-md-none"></li> <li class="pure-menu-item"><a href="https://www.facebook.com/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-facebook" style=""></span></a></li> <li class="pure-menu-item"><a href="https://twitter.com/OSTIgov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-twitter" style=""></span></a></li> <li class="pure-menu-item"><a href="https://www.youtube.com/user/ostigov" target="_blank" rel="noopener noreferrer" class="pure-menu-link social"><span class="fa fa-youtube-play" style=""></span></a></li> </ul> </div> </div> </div> </div> </footer> <link href="/pages/css/pages.fonts.200611.1302.css" rel="stylesheet"> <script src="/pages/js/pages.200611.1302.js"></script><noscript></noscript> <script src='https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.4/MathJax.js?config=TeX-MML-AM_CHTML' async> MathJax.Hub.Config({ tex2jax: {displayMath: [], inlineMath: [['$$','$$'], ['\\(','\\)']]}, asciimath2jax: {delimiters: []}, skipStartupTypeset: true, webFont: null, CommonHTML: { scale: 84, // mathjx wants to scale everything to 119% by default? 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