A study of power suppressed contributions in J/ψ → p(p)over-bar decay

被引：0
作者：
Kivel, Nikolay [1 ]
机构：
[1] Petersburg Nucl Phys Inst, Gatchina 188300, Russia
来源：
EUROPEAN PHYSICAL JOURNAL A | 2020年 / 56卷 / 02期
关键词：
EXCLUSIVE PROCESSES; DISTRIBUTION AMPLITUDES; WAVE-FUNCTIONS; HIGHER TWIST; NUCLEON; QCD; ANNIHILATION; NRQCD;
D O I：
10.1140/epja/s10050-020-00064-5
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
The power suppressed amplitude which describes the Pauli (sigma(mu nu)) coupling in the J/psi -> p (p) over bar decay is calculated within the effective field theory framework. It is shown that at the leading-order approximation this contribution is factorisable and the overlap with the hadronic final state can be described by collinear matrix elements. The obtained contribution depends on the nucleon light-cone distribution amplitudes of twist-3 and twist-4. This result is used for a qualitative phenomenological analysis of existing data for J/psi -> p (p) over bar decay: branching ratio and the angular distribution in the cross section e(+)e(-) -> J/psi -> p (p) over bar. It is found that the power corrections provide a large numerical effect.
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共 40 条
  • [1] Measurements of ψ (2S) decays to octet baryon-antibaryon pairs
    Ablikim, M.
    Bai, J. Z.
    Ban, Y.
    Cai, X.
    Chen, H. F.
    Chen, H. S.
    Chen, H. X.
    Chen, J. C.
    Chen, Jin
    Chen, Y. B.
    Chu, Y. P.
    Dai, Y. S.
    Diao, L. Y.
    Deng, Z. Y.
    Dong, Q. F.
    Du, S. U.
    Fang, J.
    Fang, S. S.
    Fu, C. D.
    Gao, C. S.
    Gao, Y. N.
    Gu, S. D.
    Gu, Y. T.
    Guo, Y. N.
    Guo, Z. J.
    Harris, F. A.
    He, K. L.
    He, M.
    Heng, Y. K.
    Hou, J.
    Hu, H. M.
    Hu, J. H.
    Hu, T.
    Huang, X. T.
    Ji, X. B.
    Jiang, X. S.
    Jiang, X. Y.
    Jiao, J. B.
    Jin, D. P.
    Jin, S.
    Lai, Y. F.
    Li, G.
    Li, H. B.
    Li, J.
    Li, R. Y.
    Li, S. M.
    Li, W. D.
    Li, W. G.
    Li, X. L.
    Li, X. N.
    [J]. PHYSICS LETTERS B, 2007, 648 (2-3) : 149 - 155
  • [2] Study of J/ψ → p(p)over-bar and J/ψ → n(n)over-bar
    Ablikim, M.
    Achasov, M. N.
    Ambrose, D. J.
    An, F. F.
    An, Q.
    An, Z. H.
    Bai, J. Z.
    Ban, Y.
    Becker, J.
    Berger, N.
    Bertani, M.
    Bian, J. M.
    Boger, E.
    Bondarenko, O.
    Boyko, I.
    Briere, R. A.
    Bytev, V.
    Cai, X.
    Calcaterra, A.
    Cao, G. F.
    Chang, J. F.
    Chelkov, G.
    Chen, G.
    Chen, H. S.
    Chen, J. C.
    Chen, M. L.
    Chen, S. J.
    Chen, Y.
    Chen, Y. B.
    Cheng, H. P.
    Chu, Y. P.
    Cronin-Hennessy, D.
    Dai, H. L.
    Dai, J. P.
    Dedovich, D.
    Deng, Z. Y.
    Denig, A.
    Denysenko, I.
    Destefanis, M.
    Ding, W. M.
    Ding, Y.
    Dong, L. Y.
    Dong, M. Y.
    Du, S. X.
    Fang, J.
    Fang, S. S.
    Fava, L.
    Feldbauer, F.
    Feng, C. Q.
    Ferroli, R. B.
    [J]. PHYSICAL REVIEW D, 2012, 86 (03)
  • [3] Measurement of the angular distribution in (p)over-barp→ψ(2S)→ e+e-
    Ambrogiani, M
    Andreotti, M
    Argiro, S
    Bagnasco, S
    Baldini, W
    Bettoni, D
    Borreani, G
    Buzzo, A
    Calabrese, R
    Cester, R
    Cibinetto, G
    Dalpiaz, P
    Fan, X
    Garzoglio, G
    Gollwitzer, KE
    Graham, M
    Hahn, A
    Hu, M
    Jin, S
    Joffe, D
    Kasper, J
    Lasio, G
    Lo Vetere, M
    Luppi, E
    Maas, P
    Macrí, M
    Mandelkern, M
    Marchetto, E
    Marinelli, M
    Marsh, W
    Martini, M
    Menichetti, E
    Metreveli, Z
    Mussa, R
    Negrini, M
    Obertino, MM
    Pallavicini, M
    Pastrone, N
    Patrignani, C
    Pedlar, TK
    Pordes, S
    Robutti, E
    Roethel, W
    Rosen, J
    Rumerio, P
    Rusack, R
    Santroni, A
    Schultz, J
    Seo, SH
    Seth, KK
    [J]. PHYSICS LETTERS B, 2005, 610 (3-4) : 177 - 182
  • [4] Higher twist nucleon distribution amplitudes in Wandzura-Wilczek approximation
    Anikin, I. V.
    Manashov, A. N.
    [J]. PHYSICAL REVIEW D, 2014, 89 (01):
  • [5] Nucleon form factors and distribution amplitudes in QCD
    Anikin, I. V.
    Braun, V. M.
    Offen, N.
    [J]. PHYSICAL REVIEW D, 2013, 88 (11):
  • [6] Bai JZ, 2004, PHYS LETT B, V591, P42, DOI [10.1016/j.physletb.2004.04.022, 10.1016/j.physletb.2004.04-022]
  • [7] Light-cone distribution amplitudes of octet baryons from lattice QCD
    Bali, Gunnar S.
    Braun, Vladimir M.
    Buerger, Simon
    Collins, Sara
    Goeckeler, Meinulf
    Gruber, Michael
    Hutzler, Fabian
    Korcyl, Piotr
    Schaefer, Andreas
    Soeldner, Wolfgang
    Sternbeck, Andre
    Wein, Philipp
    [J]. EUROPEAN PHYSICAL JOURNAL A, 2019, 55 (07)
  • [8] Light-cone distribution amplitudes of the baryon octet
    Bali, Gunnar S.
    Braun, Vladimir M.
    Goeckeler, Meinulf
    Gruber, Michael
    Hutzler, Fabian
    Schaefer, Andreas
    Schiel, Rainer W.
    Simeth, Jakob
    Soeldner, Wolfgang
    Sternbeck, Andre
    Wein, Philipp
    [J]. JOURNAL OF HIGH ENERGY PHYSICS, 2016, (02): : 1 - 47
  • [9] Perturbative QCD analysis of the nucleon's Pauli form factor F2(Q2) -: art. no. 092003
    Belitsky, AV
    Ji, XD
    Yuan, F
    [J]. PHYSICAL REVIEW LETTERS, 2003, 91 (09)
  • [10] Asymptotic expansion of Feynman integrals near threshold
    Beneke, M
    Smirnov, VA
    [J]. NUCLEAR PHYSICS B, 1998, 522 (1-2) : 321 - 344
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