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Titolo:
QCD AND INTRINSIC HEAVY-QUARK PREDICTIONS FOR LEADING CHARM AND BEAUTY HADROPRODUCTION
Autore:
VOGT R; BRODSKY SJ;
Indirizzi:
UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB BERKELEY CA 94720 STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR STANFORD CA 94309
Titolo Testata:
Nuclear physics. B
fascicolo: 1-2, volume: 438, anno: 1995,
pagine: 261 - 277
SICI:
0550-3213(1995)438:1-2<261:QAIHPF>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
YAN CROSS-SECTION; PI-P-INTERACTIONS; LUND MONTE-CARLO; D(0),(D)OVER-BAR(0) PRODUCTION; HADRONIC SCATTERING; JET FRAGMENTATION; POWER CORRECTIONS; E+E-PHYSICS; FEYNMAN-X; COLLISIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
R. Vogt e S.J. Brodsky, "QCD AND INTRINSIC HEAVY-QUARK PREDICTIONS FOR LEADING CHARM AND BEAUTY HADROPRODUCTION", Nuclear physics. B, 438(1-2), 1995, pp. 261-277

Abstract

Recent experiments at Fermilab and CERN have observed a strong asymmetry between the hadroproduction cross sections of leading D mesons, containing projectile valence quarks, and nonleading charmed mesons, without projectile valence quarks. The observed correlations of the pi(+/-)N --> D(+/-)X cross section with the projectile charge violates the usual assumption that heavy quark jet fragmentation factorizes. We examine the asymmetry between leading and nonleading charm production as a function of x(F) and p(T)(2) assuming a two-component model combining leading-twist fusion subprocesses and charm production from intrinsic heavy quark Fock stares. We predict a sizable asymmetry at low p(T)(2) and high x(F) from coalescence or me charm quarks with the comovingspectator quarks of the projectile. An intrinsic c ($) over bar c production cross section of 0.5 mu b is sufficient to explain both the magnitude and kinematic dependence of the asymmetry. In contrast, the charm jet hadronization mechanisms contained in PYTHIA predict a sizeable leading charm asymmetry even at low x(F). The two-component model isextended to predict the asymmetry in B meson production in proton-proton and pion-proton interactions.

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Documento generato il 04/12/20 alle ore 15:51:00