Transverse nucleon structure and diagnostics of hard parton-parton processes at LHC

Journal Article · Tue Mar 01 04:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.054012· OSTI ID:21578188

Frankfurt, L ^[1]; Strikman, M ^[2]; Weiss, C ^[3]

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1. School of Physics and Astronomy, Tel Aviv University, 69978 Tel Aviv (Israel)
2. Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
3. Theory Center, Jefferson Lab, Newport News, Virginia 23606 (United States)

We propose a new method to determine at what transverse momenta particle production in high-energy pp collisions is governed by hard parton-parton processes. Using information on the transverse spatial distribution of partons obtained from hard exclusive processes in ep/{gamma}p scattering, we evaluate the impact parameter distribution of pp collisions with a hard parton-parton process as a function of p{sub T} of the produced parton (jet). We find that the average pp impact parameters in such events depend very weakly on p{sub T} in the range 2<p{sub T}<few 100 GeV, while they are much smaller than those in minimum-bias inelastic collisions. The impact parameters in turn govern the observable transverse multiplicity in such events (in the direction perpendicular to the trigger particle or jet). Measuring the transverse multiplicity as a function of p{sub T} thus provides an effective tool for determining the minimum p{sub T} for which a given trigger particle originates from a hard parton-parton process. Additional tests of the proposed geometric correlations are possible by measuring the dependence on the trigger rapidity. Various strategies for implementing this method are outlined.

• OSTI ID: 21578188
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 5 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BARYONS
CERN LHC
CYCLIC ACCELERATORS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FUNCTIONS
GEOMETRY
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
IMPACT PARAMETER
INTERACTIONS
LINEAR MOMENTUM
MATHEMATICS
MULTIPLICITY
NUCLEON-NUCLEON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
SCATTERING
SPATIAL DISTRIBUTION
STORAGE RINGS
SYNCHROTRONS
TRANSVERSE MOMENTUM