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Forward-central jet correlations in pp collisions at CMS

Abstract

The azimuthal correlation between central and forward jets has been measured in proton-proton collisions at the LHC recorded with the CMS detector at a centre-of-mass energy of 7 TeV. Both jets were required to have a minimum transverse momentum of 35 GeV. The forward jet was reconstructed in the hadronic forward calorimeter within the pseudo-rapidity range 3.2< vertical stroke η vertical stroke < 4.7, while the central jet was limited to vertical stroke η vertical stroke < 2.8. The measurement is performed inclusively and also differentially for different separations in pseudo-rapidity, the largest separation allowed by the CMS detector being Δη=7.5 units. The analysis is carried out for inclusive dijet events which is then divided into two sub-samples. In one of these sub-samples, an additional jet with p{sub T}>20 GeV in the pseudo rapidity interval between the forward and the central jet is required, while in the second sub-sample events containing such jets are explicitly vetoed. Furthermore, observables describing additional jets outside of the pseudo-rapidity interval spanned by the dijet system are measured. Most of the results are found to be well described by DGLAP-based Monte Carlo event generators.
Publication Date:
Mar 15, 2014
Product Type:
Thesis/Dissertation
Report Number:
DESY-THESIS-2014-007
Resource Relation:
Other Information: Diss.
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANGULAR CORRELATION; DIFFERENTIAL CROSS SECTIONS; EXPERIMENTAL DATA; HADRONS; INCLUSIVE INTERACTIONS; JET MODEL; MULTIPLE PRODUCTION; PAIR PRODUCTION; PARTICLE RAPIDITY; PROTON-PROTON INTERACTIONS; TEV RANGE 01-10; TRANSVERSE MOMENTUM
OSTI ID:
22230892
Research Organizations:
Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Hamburg Univ. (Germany). Dept. Physik
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Other: ISSN 1435-8085; TRN: DE14F1708051977
Availability:
Available from INIS in electronic form
Submitting Site:
DE
Size:
207 page(s)
Announcement Date:
May 22, 2014

Citation Formats

Ribeiro Cipriano, Pedro Miguel. Forward-central jet correlations in pp collisions at CMS. Germany: N. p., 2014. Web.
Ribeiro Cipriano, Pedro Miguel. Forward-central jet correlations in pp collisions at CMS. Germany.
Ribeiro Cipriano, Pedro Miguel. 2014. "Forward-central jet correlations in pp collisions at CMS." Germany.
@misc{etde_22230892,
title = {Forward-central jet correlations in pp collisions at CMS}
author = {Ribeiro Cipriano, Pedro Miguel}
abstractNote = {The azimuthal correlation between central and forward jets has been measured in proton-proton collisions at the LHC recorded with the CMS detector at a centre-of-mass energy of 7 TeV. Both jets were required to have a minimum transverse momentum of 35 GeV. The forward jet was reconstructed in the hadronic forward calorimeter within the pseudo-rapidity range 3.2< vertical stroke η vertical stroke < 4.7, while the central jet was limited to vertical stroke η vertical stroke < 2.8. The measurement is performed inclusively and also differentially for different separations in pseudo-rapidity, the largest separation allowed by the CMS detector being Δη=7.5 units. The analysis is carried out for inclusive dijet events which is then divided into two sub-samples. In one of these sub-samples, an additional jet with p{sub T}>20 GeV in the pseudo rapidity interval between the forward and the central jet is required, while in the second sub-sample events containing such jets are explicitly vetoed. Furthermore, observables describing additional jets outside of the pseudo-rapidity interval spanned by the dijet system are measured. Most of the results are found to be well described by DGLAP-based Monte Carlo event generators.}
place = {Germany}
year = {2014}
month = {Mar}
}