skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Vector boson production in pPb and PbPb collisions at the LHC and its impact on nCTEQ15 PDFs

Abstract

Here, we provide a comprehensive comparison of W ±/Z vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using the nCTEQ15 PDFs. We also identify the measurements which have the largest potential impact on the PDFs, and estimate the effect of including these data using a Bayesian reweighting method. We find this data set can provide information as regards both the nuclear corrections and the heavy flavor (strange quark) PDF components. As for the proton, the parton flavor determination/separation is dependent on nuclear corrections (from heavy target DIS, for example), this information can also help improve the proton PDFs.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [2];  [5];  [2]
  1. Univ. of Grenoble (France). Lab. of Subatomic Physics and Cosmology; Polish Academy of Sciences (PAS), Krakow (Poland). Henryk Niewodniczanski Inst. of Nuclear Physics
  2. Southern Methodist University, Dallas, TX (United States)
  3. Univ. of Zurich (Switzerland). Physics Inst.
  4. University of Munster (Germany). Inst. of Theoretical Physics
  5. Univ. of Grenoble (France). Lab. of Subatomic Physics and Cosmology
Publication Date:
Research Org.:
Southern Methodist Univ., Dallas, TX (United States)
Sponsoring Org.:
USDOE; National Science Foundation (NSF)
OSTI Identifier:
1372138
Alternate Identifier(s):
OSTI ID: 1392987
Grant/Contract Number:
SC0010129; PHY11-25915
Resource Type:
Journal Article: Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 7; Journal ID: ISSN 1434-6044
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Kusina, A., Lyonnet, F., Clark, D. B., Godat, E., Ježo, T., Kovařík, K., Olness, F. I., Schienbein, I., and Yu, J. Y. Vector boson production in pPb and PbPb collisions at the LHC and its impact on nCTEQ15 PDFs. United States: N. p., 2017. Web. doi:10.1140/epjc/s10052-017-5036-x.
Kusina, A., Lyonnet, F., Clark, D. B., Godat, E., Ježo, T., Kovařík, K., Olness, F. I., Schienbein, I., & Yu, J. Y. Vector boson production in pPb and PbPb collisions at the LHC and its impact on nCTEQ15 PDFs. United States. doi:10.1140/epjc/s10052-017-5036-x.
Kusina, A., Lyonnet, F., Clark, D. B., Godat, E., Ježo, T., Kovařík, K., Olness, F. I., Schienbein, I., and Yu, J. Y. Fri . "Vector boson production in pPb and PbPb collisions at the LHC and its impact on nCTEQ15 PDFs". United States. doi:10.1140/epjc/s10052-017-5036-x.
@article{osti_1372138,
title = {Vector boson production in pPb and PbPb collisions at the LHC and its impact on nCTEQ15 PDFs},
author = {Kusina, A. and Lyonnet, F. and Clark, D. B. and Godat, E. and Ježo, T. and Kovařík, K. and Olness, F. I. and Schienbein, I. and Yu, J. Y.},
abstractNote = {Here, we provide a comprehensive comparison of W±/Z vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using the nCTEQ15 PDFs. We also identify the measurements which have the largest potential impact on the PDFs, and estimate the effect of including these data using a Bayesian reweighting method. We find this data set can provide information as regards both the nuclear corrections and the heavy flavor (strange quark) PDF components. As for the proton, the parton flavor determination/separation is dependent on nuclear corrections (from heavy target DIS, for example), this information can also help improve the proton PDFs.},
doi = {10.1140/epjc/s10052-017-5036-x},
journal = {European Physical Journal. C, Particles and Fields},
number = 7,
volume = 77,
place = {United States},
year = {Fri Jul 21 00:00:00 EDT 2017},
month = {Fri Jul 21 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1140/epjc/s10052-017-5036-x

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • Here, we provide a comprehensive comparison of W ±/Z vector boson production data in pPb and PbPb collisions at the LHC with predictions obtained using the nCTEQ15 PDFs. We also identify the measurements which have the largest potential impact on the PDFs, and estimate the effect of including these data using a Bayesian reweighting method. We find this data set can provide information as regards both the nuclear corrections and the heavy flavor (strange quark) PDF components. As for the proton, the parton flavor determination/separation is dependent on nuclear corrections (from heavy target DIS, for example), this information can alsomore » help improve the proton PDFs.« less
  • Measurements of strange hadron (K S 0, Λ+Λ¯, and Ξ–+Ξ¯+) transverse momentum spectra in pp, pPb, and Pb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pppp collisions at √ sNN =7TeV, pPb collisions at View the MathML sourcesNN=5.02TeV, and Pb collisions at √ sNN = 2.76TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between differentmore » particle species is observed to be larger for pp and pPb events than for Pb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. Lastly, the spectra are compared to models motivated by hydrodynamics.« less
  • Measurements of strange hadron (K S 0, Λ+Λ¯, and Ξ–+Ξ¯+) transverse momentum spectra in pp, pPb, and Pb collisions are presented over a wide range of rapidity and event charged-particle multiplicity. The data were collected with the CMS detector at the CERN LHC in pppp collisions at √ sNN =7TeV, pPb collisions at View the MathML sourcesNN=5.02TeV, and Pb collisions at √ sNN = 2.76TeV. The average transverse kinetic energy is found to increase with multiplicity, at a faster rate for heavier strange particle species in all systems. At similar multiplicities, the difference in average transverse kinetic energy between differentmore » particle species is observed to be larger for pp and pPb events than for Pb events. In pPb collisions, the average transverse kinetic energy is found to be slightly larger in the Pb-going direction than in the p-going direction for events with large multiplicity. Lastly, the spectra are compared to models motivated by hydrodynamics.« less
  • The LHC heavy ion data for W/Z production can provide new incisive information on the PDFs. This data is sensitive to the heavier quark flavors (strange and charm) in a high energy kinematic region; this can facilitate the determination of PDFs in the small x region where previous data was limited. At present, the flavor separation of the proton PDFs is dependent on DIS data from nuclear targets. Therefore, improved nuclear corrections can also yield enhanced flavor determination of both the proton and nuclear PDFs.
  • Here, vector-boson-tagged jet production in collisions of heavy nuclei opens new opportunities to study parton shower formation and propagation in strongly interacting matter. It has been argued to provide a golden channel that can constrain the energy loss of jets in the quark-gluon plasma created in heavy ion reactions. We present theoretical results for isolated-photon-tagged and Z 0-boson-tagged jet production in Pb + Pb collisions with √s NN = 5.02TeV at the LHC. Specifically, we evaluate the transverse momentum imbalance x JV distribution and nuclear modification factor I AA of tagged jets and compare our theoretical calculations to recent experimentalmore » measurements by ATLAS and CMS collaborations. Our analysis, which includes both collisional and radiative energy losses, sheds light on their relative importance versus the strength of jet-medium interactions and helps quantify the amount of out-of-cone radiation of predominantly prompt quark-initiated jets.« less
    Cited by 1