Multiple parton interactions in hadron collisions and diffraction

Journal Article · Thu Oct 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.074014· OSTI ID:21325229

Lipari, Paolo ^[1]; Lusignoli, Maurizio ^[2]

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1. INFN sezione Roma 'La Sapienza', Piazzale Aldo Moro 2, 00185 Roma (Italy)
2. Dipartimento di Fisica and sezione INFN, Universita di Roma 'La Sapienza', Piazzale Aldo Moro 2, 00185 Roma (Italy)

Hadrons are composite objects made of quarks and gluons, and during a collision one can have several elementary interactions between the constituents. These elementary interactions, using an appropriate theoretical framework, can be related to the total and elastic cross sections. At high c.m. energy it also becomes possible to identify experimentally a high p{sub perpendicular} subset of the parton interactions and to study their multiplicity distribution. Predictions of the multiple interaction rates are difficult because in principle one needs to have a knowledge of the correlated parton distribution functions that describe the probability to find simultaneously different partons in different elements of phase space. In this work we address this question and suggest a method to describe effectively the fluctuations in the instantaneous configuration of a colliding hadron. This problem is intimately related to the origin of the inelastic diffractive processes. We present a new method to include the diffractive cross section in an eikonal formalism that is equivalent to a multichannel eikonal. We compare with data and present an extrapolation to higher energy.

• OSTI ID: 21325229
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 80; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLLISIONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
DIFFRACTION
DISTRIBUTION
DISTRIBUTION FUNCTIONS
EIKONAL APPROXIMATION
EXTRAPOLATION
FLUCTUATIONS
FORECASTING
GLUONS
HADRONS
INTERACTIONS
MULTIPLICITY
PHASE SPACE
QUARKS