Exclusive pp{yields}pp{pi}{sup +{pi}-} reaction: From the threshold to LHC

Journal Article · Mon Feb 01 04:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.036003· OSTI ID:21409220

Lebiedowicz, P ^[1]; Szczurek, A ^[2]

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1. Institute of Nuclear Physics PAN, PL-31-342 Cracow (Poland)
2. University of Rzeszow, PL-35-959 Rzeszow (Poland)

We evaluate differential distributions for the four-body pp{yields}pp{pi}{sup +{pi}-} (and pp{yields}pp{pi}{sup +{pi}-}) reaction which constitutes an irreducible background to three-body processes pp{yields}ppM, where M are a broad resonances in the {pi}{sup +{pi}-} channel, e.g., M={sigma}, {rho}{sup 0}, f{sub 0}(980), f{sub 2}(1275), f{sub 0}(1500). We include both double-diffractive contribution (both Pomeron and Reggeon exchanges) as well as pion-pion rescattering contribution. The first process dominates at higher energies and small pion-pion invariant masses while the second becomes important at lower energies and higher pion-pion invariant masses. The amplitude(s) is(are) calculated in the Regge approach. We compare our results with measured cross sections for the Intersecting Storage Ring and Fermi National Accelerator Laboratory experiments. We make predictions for future experiments at the anti-Proton ANnihilation at DArmstadt (PANDA), Relativistic Heavy Ion Collider, Tevatron, and LHC energies. Differential distributions in invariant two-pion mass, pion rapidities and transverse momenta of pions are presented. The two-dimensional distribution in (y{sub {pi}}{sup +},y{sub {pi}}{sup -}) is particularly interesting. The higher the incident energy, the higher preference for the same-hemisphere emission of pions. The processes considered constitute a sizeable contribution to the total nucleon-nucleon cross section as well as to pion inclusive cross section.

• OSTI ID: 21409220
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BOSONS
BROOKHAVEN RHIC
CERN LHC
CROSS SECTIONS
CYCLIC ACCELERATORS
DISTRIBUTION
ELEMENTARY PARTICLES
F0-980 MESONS
FERMILAB TEVATRON
FOUR-BODY PROBLEM
HADRON-HADRON INTERACTIONS
HADRONS
HEAVY ION ACCELERATORS
INTERACTIONS
LINEAR MOMENTUM
MANY-BODY PROBLEM
MASS
MESONS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PARTICLE RAPIDITY
PIONS
PIONS MINUS
PIONS PLUS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESCATTERING
SCALAR MESONS
SCATTERING
STORAGE RINGS
SYNCHROTRONS
THREE-BODY PROBLEM
TRANSVERSE MOMENTUM