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Title: Probing superfast quarks in nuclei through dijet production at the LHC

Abstract

We investigate dijet production from proton-nucleus collisions at the Large Hadron Collider (LHC) as a means for observing superfast quarks in nuclei with Bjorken x>1 . Kinematically, superfast quarks can be identified through directly measurable jet kinematics. Dynamically, their description requires understanding several elusive properties of nuclear QCD, such as nuclear forces at very short distances, as well as medium modification of parton distributions in nuclei. In the present work, we develop a model for nuclear parton distributions at large x in which the nuclear dynamics at short distance scales are described by two- and three-nucleon short range correlations (SRCs). Nuclear modifications are accounted for using the color screening model, and an improved description of the EMC effect is reached by using a structure function parametrization that includes higher-twist contributions. We apply QCD evolution at the leading order to obtain nuclear parton distributions in the kinematic regime of the LHC, and based on the obtained distributions calculate the cross section for dijet production. We find that the rates of the dijet production in pA collisions at kinematics accessible by ATLAS and CMS are sufficient not only to observe superfast quarks but also to get information about the practically unexplored three-nucleonmore » SRCs in nuclei. Additionally, the LHC can extend our knowledge of the EMC effect to large Q2 where higher-twist effects are negligible.« less

Authors:
; ;
Publication Date:
Research Org.:
Pennsylvania State Univ., University Park, PA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1503041
Alternate Identifier(s):
OSTI ID: 1437998
Grant/Contract Number:  
FG02- 93ER40771; FG02-01ER-41172; FG02-93ER40771
Resource Type:
Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 75 Journal Issue: 11; Journal ID: ISSN 1434-6044
Publisher:
Springer Science + Business Media
Country of Publication:
Germany
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Freese, Adam J., Sargsian, Misak M., and Strikman, Mark I. Probing superfast quarks in nuclei through dijet production at the LHC. Germany: N. p., 2015. Web. doi:10.1140/epjc/s10052-015-3755-4.
Freese, Adam J., Sargsian, Misak M., & Strikman, Mark I. Probing superfast quarks in nuclei through dijet production at the LHC. Germany. doi:10.1140/epjc/s10052-015-3755-4.
Freese, Adam J., Sargsian, Misak M., and Strikman, Mark I. Thu . "Probing superfast quarks in nuclei through dijet production at the LHC". Germany. doi:10.1140/epjc/s10052-015-3755-4.
@article{osti_1503041,
title = {Probing superfast quarks in nuclei through dijet production at the LHC},
author = {Freese, Adam J. and Sargsian, Misak M. and Strikman, Mark I.},
abstractNote = {We investigate dijet production from proton-nucleus collisions at the Large Hadron Collider (LHC) as a means for observing superfast quarks in nuclei with Bjorken x>1 . Kinematically, superfast quarks can be identified through directly measurable jet kinematics. Dynamically, their description requires understanding several elusive properties of nuclear QCD, such as nuclear forces at very short distances, as well as medium modification of parton distributions in nuclei. In the present work, we develop a model for nuclear parton distributions at large x in which the nuclear dynamics at short distance scales are described by two- and three-nucleon short range correlations (SRCs). Nuclear modifications are accounted for using the color screening model, and an improved description of the EMC effect is reached by using a structure function parametrization that includes higher-twist contributions. We apply QCD evolution at the leading order to obtain nuclear parton distributions in the kinematic regime of the LHC, and based on the obtained distributions calculate the cross section for dijet production. We find that the rates of the dijet production in pA collisions at kinematics accessible by ATLAS and CMS are sufficient not only to observe superfast quarks but also to get information about the practically unexplored three-nucleon SRCs in nuclei. Additionally, the LHC can extend our knowledge of the EMC effect to large Q2 where higher-twist effects are negligible.},
doi = {10.1140/epjc/s10052-015-3755-4},
journal = {European Physical Journal. C, Particles and Fields},
number = 11,
volume = 75,
place = {Germany},
year = {2015},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1140/epjc/s10052-015-3755-4

Citation Metrics:
Cited by: 5 works
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    Works referencing / citing this record:

    Evidence for x -dependent proton color fluctuations in p A collisions at the CERN Large Hadron Collider
    journal, January 2016


    Multinucleon short-range correlation model for nuclear spectral functions: Theoretical framework
    journal, December 2016


    Nucleon-nucleon correlations, short-lived excitations, and the quarks within
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