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Title: Implications of CMS analysis of photon-photon interactions for photon PDFs

Abstract

As part of a recent analysis of exclusive two-photon production of W + W pairs at the LHC, the CMS experiment used di-lepton data to obtain an “effective” photon-photon luminosity. We show how the CMS analysis on their 8 TeV data, along with some assumptions about the likelihood for events in which the proton breaks up to pass the selection criteria, can be used to significantly constrain the photon parton distribution functions, such as those from the CTEQ, MRST, and NNPDF collaborations. We compare the data with predictions using these photon distributions, as well as the new LUXqed photon distribution. We study the impact of including these data on the NNPDF2.3QED, NNPDF3.0QED and CT14QEDinc fits. We find that these data place a useful and complementary cross-check on the photon distribution, which is consistent with the LUXqed prediction while suggesting that the NNPDF photon error band should be significantly reduced. Additionally, we propose a simple model for describing the two-photon production of W + W at the LHC. In conclusion, using this model, we constrain the number of inelastic photons that remain after the experimental cuts are applied.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [3]
  1. Xinjiang Univ., Xinjiang (China)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Michigan State Univ., East Lansing, MI (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1497101
Report Number(s):
arXiv:1603.04874; FERMILAB-PUB-18-742-T
Journal ID: ISSN 1674-1137; 1428662
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Chinese Physics. C, High Energy Physics and Nuclear Physics
Additional Journal Information:
Journal Volume: 42; Journal Issue: 11; Journal ID: ISSN 1674-1137
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; applications of electroweak models to specific processes; summation of perturbation theory; inclusive production with identified leptons; photons or other nonhadronic particles

Citation Formats

Obul, Pazilet, Ababekri, Mamut, Dulat, Sayipjamal, Isaacson, Joshua, Schmidt, Carl, and Yuan, C. -P. Implications of CMS analysis of photon-photon interactions for photon PDFs. United States: N. p., 2018. Web. doi:10.1088/1674-1137/42/11/113101.
Obul, Pazilet, Ababekri, Mamut, Dulat, Sayipjamal, Isaacson, Joshua, Schmidt, Carl, & Yuan, C. -P. Implications of CMS analysis of photon-photon interactions for photon PDFs. United States. doi:10.1088/1674-1137/42/11/113101.
Obul, Pazilet, Ababekri, Mamut, Dulat, Sayipjamal, Isaacson, Joshua, Schmidt, Carl, and Yuan, C. -P. Tue . "Implications of CMS analysis of photon-photon interactions for photon PDFs". United States. doi:10.1088/1674-1137/42/11/113101. https://www.osti.gov/servlets/purl/1497101.
@article{osti_1497101,
title = {Implications of CMS analysis of photon-photon interactions for photon PDFs},
author = {Obul, Pazilet and Ababekri, Mamut and Dulat, Sayipjamal and Isaacson, Joshua and Schmidt, Carl and Yuan, C. -P.},
abstractNote = {As part of a recent analysis of exclusive two-photon production of W+ W – pairs at the LHC, the CMS experiment used di-lepton data to obtain an “effective” photon-photon luminosity. We show how the CMS analysis on their 8 TeV data, along with some assumptions about the likelihood for events in which the proton breaks up to pass the selection criteria, can be used to significantly constrain the photon parton distribution functions, such as those from the CTEQ, MRST, and NNPDF collaborations. We compare the data with predictions using these photon distributions, as well as the new LUXqed photon distribution. We study the impact of including these data on the NNPDF2.3QED, NNPDF3.0QED and CT14QEDinc fits. We find that these data place a useful and complementary cross-check on the photon distribution, which is consistent with the LUXqed prediction while suggesting that the NNPDF photon error band should be significantly reduced. Additionally, we propose a simple model for describing the two-photon production of W+ W – at the LHC. In conclusion, using this model, we constrain the number of inelastic photons that remain after the experimental cuts are applied.},
doi = {10.1088/1674-1137/42/11/113101},
journal = {Chinese Physics. C, High Energy Physics and Nuclear Physics},
issn = {1674-1137},
number = 11,
volume = 42,
place = {United States},
year = {2018},
month = {9}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 1 work
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Figures / Tables:

Figure 1 Figure 1: Various elastic (EPA), inelastic (CT14QED) and inclusive (CT14QEDinc, LUXqed, NNPDF3.0) photon PDF distributions at (a) Q=3.2 GeV and (b) Q=100 GeV.

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.