Isolated prompt photon production in hadronic final states of e(+)e(-) annihilation

被引:21
作者
Berger, EL [1 ]
Guo, XF [1 ]
Qiu, JW [1 ]
机构
[1] IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011
来源
PHYSICAL REVIEW D | 1996年 / 54卷 / 09期
关键词
D O I
10.1103/PhysRevD.54.5470
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We provide complete analytic expressions for the isolated prompt photon production cross section in e(+)e(-) annihilation reactions through one-loop order in quantum chromodynamics (QCD) perturbation theory. Functional dependences on the isolation cone size delta and isolation energy parameter epsilon are derived. The energy dependence as well as the full angular dependence pf the cross section on theta(gamma) are displayed, where theta(gamma) specifies the direction of the photon with respect to the e(+)e(-) collision axis. We point out that conventional perturbative QCD factorization breaks down for isolated photon production in e(+)e(-) annihilation reactions in a specific region of phase space. We discuss the implications of this breakdown for the extraction of fragmentation functions from e(+)e(-) annihilation data and for computations of prompt photon production in hadron-hadron reactions.
引用
收藏
页码:5470 / 5495
页数:26
相关论文
共 30 条
[1]  
ABREU P, 1992, Z PHYS C PART FIELDS, V53, P555, DOI 10.1007/BF01559732
[2]   NUCLEAR EFFECTS IN 800 GEV PROTON INTERACTIONS [J].
SHIVPURI, RK ;
GREWAL, D ;
VERMA, VK .
ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1993, 58 (03) :419-422
[3]   ISOLATED HARD PHOTON-EMISSION IN HADRONIC Z0 DECAYS [J].
ADRIANI, O ;
AGUILARBENITEZ, M ;
AHLEN, S ;
AKBARI, H ;
ALCARAZ, J ;
ALOISIO, A ;
ALVERSON, G ;
ALVIGGI, MG ;
AMBROSI, G ;
AN, Q ;
ANDERHUB, H ;
ANDERSON, AL ;
ANDREEV, VP ;
ANGELOV, T ;
ANTONOV, L ;
ANTREASYAN, D ;
ARCE, P ;
AREFIEV, A ;
ATAMANCHUK, A ;
AZEMOON, T ;
AZIZ, T ;
BABA, PVKS ;
BAGNAIA, P ;
BAKKEN, JA ;
BAKSAY, L ;
BALL, RC ;
BANERJEE, S ;
BAO, J ;
BARILLERE, R ;
BARONE, L ;
BATTISTON, R ;
BAY, A ;
BECATTINI, F ;
BECKER, U ;
BEHNER, F ;
BEHRENS, J ;
BEINGESSNER, S ;
BENCZE, GL ;
BERDUGO, J ;
BERGES, P ;
BERTUCCI, B ;
BETEV, BL ;
BIASINI, M ;
BILAND, A ;
BILEI, GM ;
BIZZARRI, R ;
BLAISING, JJ ;
BLUMENFELD, B ;
BOBBINK, GJ ;
BOCCIOLINI, M .
PHYSICS LETTERS B, 1992, 292 (3-4) :472-484
[4]   PROCESSES INVOLVING FRAGMENTATION FUNCTIONS BEYOND THE LEADING ORDER IN QCD [J].
ALTARELLI, G ;
ELLIS, RK ;
MARTINELLI, G ;
PI, SY .
NUCLEAR PHYSICS B, 1979, 160 (02) :301-329
[5]   NEXT-TO-LEADING ORDER BREMSSTRAHLUNG CONTRIBUTION TO PROMPT-PHOTON PRODUCTION [J].
AURENCHE, P ;
CHIAPPETTA, P ;
FONTANNAZ, M ;
GUILLET, JP ;
PILON, E .
NUCLEAR PHYSICS B, 1993, 399 (01) :34-62
[6]   NEXT-TO-LEADING-LOGARITHM CALCULATION OF DIRECT PHOTON PRODUCTION [J].
BAER, H ;
OHNEMUS, J ;
OWENS, JF .
PHYSICAL REVIEW D, 1990, 42 (01) :61-71
[7]   Inclusive prompt photon production in hadronic final states of e(+)e(-) annihilation [J].
Berger, EL ;
Guo, XF ;
Qiu, JW .
PHYSICAL REVIEW D, 1996, 53 (03) :1124-1141
[8]   UNDERSTANDING THE CROSS-SECTION FOR ISOLATED PROMPT PHOTON PRODUCTION [J].
BERGER, EL ;
QIU, JW .
PHYSICS LETTERS B, 1990, 248 (3-4) :371-377
[9]   Breakdown of conventional factorization for isolated photon cross sections [J].
Berger, EL ;
Guo, XF ;
Qiu, JW .
PHYSICAL REVIEW LETTERS, 1996, 76 (13) :2234-2237
[10]   CALCULATIONS OF PROMPT-PHOTON PRODUCTION IN QCD [J].
BERGER, EL ;
QIU, JW .
PHYSICAL REVIEW D, 1991, 44 (07) :2002-2024