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

Title: Evidence for x -dependent proton color fluctuations in p A collisions at the CERN Large Hadron Collider

Journal Article · · Physical Review C
 [1];  [2];  [3];  [4];  [5]
  1. Research Inst. for Geo-Hydrological Protection (IRPI), Perugia (Italy). National Research Council (CNR)
  2. Columbia Univ., New York, NY (United States). Physics Dept.
  3. Tel Aviv Univ. (Israel). Dept. of Particle Physics
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Pennsylvania State Univ., University Park, PA (United States)

The centrality dependence of forward jet production in pA collisions at the Large Hadron Collider (LHC) has been found to grossly violate the Glauber model prediction in a way that depends on the x in the proton. In this paper, we argue that this modification pattern provides the first experimental evidence for x-dependent proton color fluctuation effects. On average, parton configurations in the projectile proton containing a parton with large x interact with a nuclear target with a significantly smaller than average cross section and have smaller than average size. We implement the effects of fluctuations of the interaction strength and, using the ATLAS analysis of how hadron production at backward rapidities depends on the number of wounded nucleons, make quantitative predictions for the centrality dependence of the jet production rate as a function of the x-dependent interaction strength σ(x). We find that σ(x) ~ 0.6(σ) gives a good description of the data at x = 0.6. Finally, these findings support an explanation of the European Muon Collaboration effect as arising from the suppression of small-size nucleon configurations in the nucleus.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Research Inst. for Geo-Hydrological Protection (IRPI), Perugia (Italy)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP); Region of Umbria (Italy); Dept. of Civil Protection (Italy); United States-Israel Binational Science Foundation (BSF) (Israel)
Contributing Organization:
Columbia Univ., New York, NY (United States); Tel Aviv Univ. (Israel); Pennsylvania State Univ., University Park, PA (United States)
Grant/Contract Number:
AC02-98CH10886; FG02-86ER40281; FG02-93ER40771; POR-FESR Umbria 20072013; 0603216203
OSTI ID:
1341651
Alternate ID(s):
OSTI ID: 1235626
Report Number(s):
BNL-113375-2016-JA
Journal Information:
Physical Review C, Vol. 93, Issue 1; ISSN 2469-9985
Publisher:
APSCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

References (29)

Model of the bare Pomeron journal July 1975
Coherent nuclear diffractive production of minijets — illuminating color transparency journal April 1993
Observation of Color-Transparency in Diffractive Dissociation of Pions journal May 2001
Measurement of Nuclear Transparency for the A ( e , e π + ) Reaction journal December 2007
Evidence for the onset of color transparency in <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mrow><mml:mi>ρ</mml:mi></mml:mrow><mml:mrow><mml:mn>0</mml:mn></mml:mrow></mml:msup></mml:math> electroproduction off nuclei journal June 2012
Centrality and rapidity dependence of inclusive jet production in s NN = 5.02 TeV proton–lead collisions with the ATLAS detector journal September 2015
Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at $$\sqrt{s_{\mathrm{NN}}} = 5.02$$ s NN = 5.02 $$\,\text {TeV}$$ TeV journal July 2014
Color screening and color transparency in hard nuclear processes journal January 1991
Diffraction scattering and the parton structure of hadrons journal September 1978
Diffraction Dissociation of Beam Particles journal December 1960
Revealing “flickering” of the interaction strength in p A collisions at the CERN LHC journal September 2014
How transparent are hadrons to pions? journal February 1993
Hadronic cross-section fluctuations journal April 1993
Analysis of diffractive pd Xd and pp Xp interactions and test of the finite-mass sum rule journal December 1976
Glauber theory, unitarity and the AGK cancellation journal February 1977
Color transparency, color opacity, and fluctuations in nuclear collisions journal November 1991
Correlations and fluctuations in high-energy nuclear collisions journal September 1995
Color fluctuation effects in proton–nucleus collisions journal May 2013
Geometrical Color Optics of Coherent High-Energy Processes journal December 1994
Scaling Laws at Large Transverse Momentum journal October 1973
Point-like configurations in hadrons and nuclei and deep inelastic reactions with leptons: EMC and EMC-like effects journal January 1985
A Monte Carlo generator of nucleon configurations in complex nuclei including nucleon–nucleon correlations journal September 2009
AdS/CFT and Light-Front QCD conference January 2012
Probing superfast quarks in nuclei through dijet production at the LHC journal November 2015
A Monte Carlo generator of nucleon configurations in complex nuclei including Nucleon-Nucleon correlations text January 2009
Color fluctuation effects in proton-nucleus collisions text January 2013
Probing superfast quarks in nuclei through dijet production at the LHC text January 2014
Coherent Nuclear Diffractive Production of Minijets - Illuminating Color Transparency text January 1993
The Geometrical Color Optics Of Coherent High Energy Processes text January 1994

Cited By (7)

PANDA as midrapidity detector for a future HESR Collider at FAIR journal June 2020
Revealing minijet dynamics via centrality dependence of double parton interactions in proton–nucleus collisions journal June 2019
PANDA as midrapidity detector for a future HESR Collider at FAIR text January 2020
PANDA as midrapidity detector for a future HESR Collider at FAIR text January 2020
Initial state fluctuations in collisions between light and heavy ions text January 2016
Revealing proton shape fluctuations with incoherent diffraction at high energy text January 2016
Spin-isospin correlated configurations in complex nuclei and neutron skin effect in W$^\pm$ production in high-energy proton-lead collisions text January 2018

Figures / Tables (4)