Extended study of prompt photon photoproduction at HERA with kT-factorization

被引：10
|
作者：
Lipatov, A. V. [1 ,2 ]
Malyshev, M. A. [1 ]
Zotov, N. P. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow 119991, Russia
[2] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
来源：
PHYSICAL REVIEW D | 2013年 / 88卷 / 07期
关键词：
SMALL-X PHENOMENOLOGY; HEAVY-QUARK PRODUCTION; PARTON DISTRIBUTIONS; PROTON;
D O I：
10.1103/PhysRevD.88.074001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We reconsider prompt photon photoproduction at HERA in the framework of the k(T)-factorization QCD approach. The proposed method is based on the O(alpha(2)alpha(s)) amplitudes for gamma q -> gamma gq and gamma g -> gamma q (q) over bar partonic subprocesses. Additionally, we take into account the O(alpha(2)alpha(2)(s)) box contributions gamma g -> gamma g to the production cross sections. The unintegrated (or transverse momentum dependent) parton densities in the proton are determined using the Kimber-Martin-Ryskin prescription. Our consideration covers both inclusive and jet associated prompt photon photoproduction rates. We find that our numerical predictions agree well with the recent data taken by H1 and ZEUS Collaborations at HERA. We demonstrate that the box contributions are sizable and amount to up to similar to 15% of the calculated total cross section.
引用
收藏
页数：13
相关论文
共 50 条
  • [31] Charm photoproduction at DESY HERA:: kT factorization versus experimental data
    Lipatov, A. V.
    Zotov, N. P.
    PHYSICAL REVIEW D, 2007, 75 (01):
  • [32] Photoproduction of J/ψ mesons at high energies within the parton model and in the kT-factorization approach
    Saleev, VA
    PHYSICS OF ATOMIC NUCLEI, 2003, 66 (03) : 575 - 581
  • [33] Photoproduction of J/ψ mesons at high energies within the parton model and in the kT-factorization approach
    V. A. Saleev
    Physics of Atomic Nuclei, 2003, 66 : 575 - 581
  • [34] Prompt photons in photoproduction at HERA
    Aaron, F. D.
    Martin, M. Aldaya
    Alexa, C.
    Andreev, V.
    Antunovic, B.
    Backovic, S.
    Baghdasaryan, A.
    Barrelet, E.
    Bartel, W.
    Begzsuren, K.
    Belousov, A.
    Bizot, J. C.
    Boudry, V.
    Bozovic-Jelisavcic, I.
    Bracinik, J.
    Brandt, G.
    Brinkmann, M.
    Brisson, V.
    Bruncko, D.
    Bunyatyan, A.
    Buschhorn, G.
    Bystritskaya, L.
    Campbell, A. J.
    Cantun Avila, K. B.
    Cerny, K.
    Cerny, V.
    Chekelian, V.
    Cholewa, A.
    Contreras, J. G.
    Coughlan, J. A.
    Cozzika, G.
    Cvach, J.
    Dainton, J. B.
    Daum, K.
    Deak, M.
    de Boer, Y.
    Delcourt, B.
    Del Degan, M.
    Delvax, J.
    De Wolf, E. A.
    Diaconu, C.
    Dodonov, V.
    Dossanov, A.
    Dubak, A.
    Eckerlin, G.
    Efremenko, V.
    Egli, S.
    Eliseev, A.
    Elsen, E.
    Falkiewicz, A.
    EUROPEAN PHYSICAL JOURNAL C, 2010, 66 (1-2): : 17 - 33
  • [35] Prompt photons in photoproduction at HERA
    F. D. Aaron
    M. Aldaya Martin
    C. Alexa
    V. Andreev
    B. Antunovic
    S. Backovic
    A. Baghdasaryan
    E. Barrelet
    W. Bartel
    K. Begzsuren
    A. Belousov
    J. C. Bizot
    V. Boudry
    I. Bozovic-Jelisavcic
    J. Bracinik
    G. Brandt
    M. Brinkmann
    V. Brisson
    D. Bruncko
    A. Bunyatyan
    G. Buschhorn
    L. Bystritskaya
    A. J. Campbell
    K. B. Cantun Avila
    K. Cerny
    V. Cerny
    V. Chekelian
    A. Cholewa
    J. G. Contreras
    J. A. Coughlan
    G. Cozzika
    J. Cvach
    J. B. Dainton
    K. Daum
    M. Deák
    Y. de Boer
    B. Delcourt
    M. Del Degan
    J. Delvax
    E. A. De Wolf
    C. Diaconu
    V. Dodonov
    A. Dossanov
    A. Dubak
    G. Eckerlin
    V. Efremenko
    S. Egli
    A. Eliseev
    E. Elsen
    A. Falkiewicz
    The European Physical Journal C, 2010, 66 : 17 - 33
  • [36] Prompt photon photoproduction at HERA within the framework of the quark Reggeization hypothesis
    Saleev, V. A.
    PHYSICAL REVIEW D, 2008, 78 (11):
  • [37] Prompt photon photoproduction at HERA with non-collinear parton dynamics
    Lipatov, A. V.
    Zotov, N. P.
    DIFFRACTION 2010: INTERNATIONAL WORKSHOP ON DIFFRACTION IN HIGH ENERGY PHYSICS, 2011, 1350
  • [38] Deep inelastic J/ψ production at HERA in the kT-factorization approach and its consequences on the nonrelativistic QCD
    Baranov, SP
    Zotov, NP
    JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2003, 29 (07) : 1395 - 1408
  • [39] Associated photon and heavy quark production at high energy within kT-factorization
    Lipatov, A. V.
    Malyshev, M. A.
    Zotov, N. P.
    DIFFRACTION 2012, 2013, 1523 : 260 - 263
  • [40] Exclusive photoproduction of charmonia in γp → Vp and pp → pVp reactions within kt-factorization approach
    Cisek, Anna
    Schaefer, Wolfgang
    Szczurek, Antoni
    JOURNAL OF HIGH ENERGY PHYSICS, 2015, (04):
12345