Disentangling coherent and incoherent quasielastic J/ψ photoproduction on nuclei by neutron tagging in ultraperipheral ion collisions at the LHC

被引:0
作者
Guzey, V. [1 ]
Strikman, M. [2 ]
Zhalov, M. [1 ]
机构
[1] Natl Res Ctr Kurchatov Inst, PNPI, Gatchina 188300, Russia
[2] Penn State Univ, University Pk, PA 16802 USA
来源
EUROPEAN PHYSICAL JOURNAL C | 2014年 / 74卷 / 07期
关键词
PB-PB COLLISIONS; CROSS-SECTIONS; QCD ANALYSIS; DISSOCIATION; E(+)E(-); MESONS;
D O I
10.1140/epjc/s10052-014-2942-z
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We consider J/psi photoproduction in ion-ion ultraperipheral collisions (UPCs) at the LHC and RHIC in the coherent and incoherent quasielastic channels with and without accompanying forward neutron emission and analyze the role of nuclear gluon shadowing at small x, x = 10(-4)-10(-2), in these processes. We find that despite the good agreement between large nuclear gluon shadowing and the ALICE data in the coherent channel, in the incoherent channel, the leading twist approximation predicts the amount of nuclear suppression which is by approximately a factor of 1.5 exceeds that seen in the data. We hypothesize that part of the discrepancy can be accounted for by the incoherent inelastic process of J/psi photoproduction with nucleon dissociation. To separate the high-photon-energy and low-photon-energy contributions to the d sigma(AA -> AAJ/psi)(y)/dy cross section, we consider ion-ion UPCs accompanied by neutron emission due to electromagnetic excitation of one or both colliding nuclei. We describe the corresponding PHENIX data and make predictions for the LHC kinematics. In addition, in the incoherent quasielastic case, we show that the separation between the low-photon-energy and high-photon-energy contributions can be efficiently performed by measuring the correlation between the directions of J/psi and the emitted neutrons.
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共 43 条
[1]  
Abbas E, 2013, EUR PHYS J C, V73, DOI 10.1140/epjc/s10052-013-2617-1
[2]   Coherent J/ψ photoproduction in ultra-peripheral Pb-Pb collisions at √sNN=2.76 TeV [J].
Abelev, B. ;
Adam, J. ;
Adamova, D. ;
Adare, A. M. ;
Aggarwal, M. M. ;
Rinella, G. Aglieri ;
Agnello, M. ;
Agocs, A. G. ;
Agostinelli, A. ;
Aguilar Salazar, S. ;
Ahammed, Z. ;
Masoodi, A. Ahmad ;
Ahmad, N. ;
Ahn, S. A. ;
Ahn, S. U. ;
Akindinov, A. ;
Aleksandrov, D. ;
Alessandro, B. ;
Molina, R. Alfaro ;
Alici, A. ;
Alkin, A. ;
Almaraz Avina, E. ;
Alme, J. ;
Alt, T. ;
Altini, V. ;
Altsybeev, I. ;
Andrei, C. ;
Andronic, A. ;
Anguelov, V. ;
Anielski, J. ;
Anson, C. ;
Anticic, T. ;
Antinori, F. ;
Antonioli, P. ;
Aphecetche, L. ;
Appelshaeuser, H. ;
Arbor, N. ;
Arcelli, S. ;
Arend, A. ;
Armesto, N. ;
Arnaldi, R. ;
Aronsson, T. ;
Arsene, I. C. ;
Arslandok, M. ;
Asryan, A. ;
Augustinus, A. ;
Averbeck, R. ;
Awes, T. C. ;
Aysto, J. ;
Azmi, M. D. .
PHYSICS LETTERS B, 2013, 718 (4-5) :1273-1283
[3]   Measurement of the Cross Section for Electromagnetic Dissociation with Neutron Emission in Pb-Pb Collisions at √sNN=2.76 TeV [J].
Abelev, B. ;
Adam, J. ;
Adamova, D. ;
Adare, A. M. ;
Aggarwal, M. M. ;
Rinella, G. Aglieri ;
Agocs, A. G. ;
Agostinelli, A. ;
Aguilar Salazar, S. ;
Ahammed, Z. ;
Masoodi, A. Ahmad ;
Ahmad, N. ;
Ahn, S. U. ;
Akindinov, A. ;
Aleksandrov, D. ;
Alessandro, B. ;
Alfaro Molina, R. ;
Alici, A. ;
Alkin, A. ;
Almaraz Avina, E. ;
Alme, J. ;
Alt, T. ;
Altini, V. ;
Altinpinar, S. ;
Altsybeev, I. ;
Andrei, C. ;
Andronic, A. ;
Anguelov, V. ;
Anielski, J. ;
Anticic, T. ;
Antinori, F. ;
Antonioli, P. ;
Aphecetche, L. ;
Appelshaeuser, H. ;
Arbor, N. ;
Arcelli, S. ;
Arend, A. ;
Armesto, N. ;
Arnaldi, R. ;
Aronsson, T. ;
Arsene, I. C. ;
Arslandok, M. ;
Augustinus, A. ;
Averbeck, R. ;
Awes, T. C. ;
Aysto, J. ;
Azmi, M. D. ;
Bach, M. ;
Badala, A. ;
Baek, Y. W. .
PHYSICAL REVIEW LETTERS, 2012, 109 (25)
[4]  
ABRAMOVSKII VA, 1974, SOV J NUCL PHYS+, V18, P308
[5]   Photoproduction of J/ψ and of high mass e+e- in ultra-peripheral Au plus Au collisions at √sNN=200 GeV [J].
Afanasiev, S. ;
Aidala, C. ;
Ajitanand, N. N. ;
Akiba, Y. ;
Alexander, J. ;
Al-Jamel, A. ;
Aoki, K. ;
Aphecetche, L. ;
Armendariz, R. ;
Aronson, S. H. ;
Averbeck, R. ;
Awes, T. C. ;
Azmoun, B. ;
Babintsev, V. ;
Baldisseri, A. ;
Barish, K. N. ;
Barnes, P. D. ;
Bassalleck, B. ;
Bathe, S. ;
Batsouli, S. ;
Baublis, V. ;
Bauer, F. ;
Bazilevsky, A. ;
Belikov, S. ;
Bennett, R. ;
Berdnikov, Y. ;
Bjorndal, M. T. ;
Boissevain, J. G. ;
Borel, H. ;
Boyle, K. ;
Brooks, M. L. ;
Brown, D. S. ;
Bucher, D. ;
Buesching, H. ;
Bumazhnov, V. ;
Bunce, G. ;
Burward-Hoy, J. M. ;
Butsyk, S. ;
Campbell, S. ;
Chai, J. -S. ;
Chernichenko, S. ;
Chiba, J. ;
Chi, C. Y. ;
Chiu, M. ;
Choi, I. J. ;
Chujo, T. ;
Cianciolo, V. ;
Cleven, C. R. ;
Cobigo, Y. ;
Cole, B. A. .
PHYSICS LETTERS B, 2009, 679 (04) :321-329
[6]   Measurement and QCD analysis of the diffractive deep-inelastic scattering cross section at HERA [J].
Aktas, A. ;
Andreev, V. ;
Anthonis, T. ;
Antunovic, B. ;
Aplin, S. ;
Asmone, A. ;
Astvatsatourov, A. ;
Babaev, A. ;
Backovic, S. ;
Baghdasaryan, A. ;
Baranov, P. ;
Barrelet, E. ;
Bartel, W. ;
Baudrand, S. ;
Baumgartner, S. ;
Beckingham, M. ;
Behnke, O. ;
Behrendt, O. ;
Belousov, A. ;
Berger, N. ;
Bizot, J. C. ;
Boenig, M. -O. ;
Boudry, V. ;
Bracinik, J. ;
Brandt, G. ;
Brisson, V. ;
Bruncko, D. ;
Buesser, F. W. ;
Bunyatyan, A. ;
Buschhorn, G. ;
Bystritskaya, L. ;
Campbell, A. J. ;
Cassol-Brunner, F. ;
Cerny, K. ;
Cerny, V. ;
Chekelian, V. ;
Contreras, J. G. ;
Coughlan, J. A. ;
Coppens, Y. R. ;
Cox, B. E. ;
Cozzika, G. ;
Cvach, J. ;
Dainton, J. B. ;
Dau, W. D. ;
Daum, K. ;
de Boer, Y. ;
Delcourt, B. ;
Del Degan, M. ;
De Roeck, A. ;
De Wolf, E. A. .
EUROPEAN PHYSICAL JOURNAL C, 2006, 48 (03) :715-748
[7]   Elastic and proton-dissociative photoproduction of J/ψ mesons at HERA [J].
Alexa, C. ;
Andreev, V. ;
Baghdasaryan, A. ;
Baghdasaryan, S. ;
Bartel, W. ;
Begzsuren, K. ;
Belousov, A. ;
Belov, P. ;
Boudry, V. ;
Bozovic-Jelisavcic, I. ;
Brandt, G. ;
Brinkmann, M. ;
Brisson, V. ;
Britzger, D. ;
Buniatyan, A. ;
Bylinkin, A. ;
Bystritskaya, L. ;
Campbell, A. J. ;
Cantun Avila, K. B. ;
Ceccopieri, F. ;
Cerny, K. ;
Chekelian, V. ;
Contreras, J. G. ;
Cvach, J. ;
Dainton, J. B. ;
Daum, K. ;
De Wolf, E. A. ;
Diaconu, C. ;
Dobre, M. ;
Dodonov, V. ;
Dossanov, A. ;
Eckerlin, G. ;
Egli, S. ;
Elsen, E. ;
Favart, L. ;
Fedotov, A. ;
Felst, R. ;
Feltesse, J. ;
Ferencei, J. ;
Fischer, D. -J. ;
Fleischer, M. ;
Fomenko, A. ;
Gabathuler, E. ;
Gayler, J. ;
Ghazaryan, S. ;
Glazov, A. ;
Goerlich, L. ;
Gogitidze, N. ;
Gouzevitch, M. ;
Grab, C. .
EUROPEAN PHYSICAL JOURNAL C, 2013, 73 (06)
[8]   The physics of ultraperipheral collisions at the LHC [J].
Baltz, A. J. ;
Baur, G. ;
d'Enterria, D. ;
Frankfurt, L. ;
Gelis, F. ;
Guzey, V. ;
Hencken, K. ;
Kharlov, Yu. ;
Klasen, M. ;
Klein, S. R. ;
Nikulin, V. ;
Nystrand, J. ;
Pshenichnov, I. A. ;
Sadovsky, S. ;
Scapparone, E. ;
Seger, J. ;
Strikman, M. ;
Tverskoy, M. ;
Vogt, R. ;
White, S. N. ;
Wiedemann, U. A. ;
Yepes, P. ;
Zhalov, M. .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2008, 458 (1-3) :1-171
[9]   Coherent vector-meson photoproduction with nuclear breakup in relativistic heavy-ion collisions [J].
Baltz, AJ ;
Klein, SR ;
Nystrand, J .
PHYSICAL REVIEW LETTERS, 2002, 89 (01) :123011-123014
[10]   CORRECTION [J].
BAUER, TH .
REVIEWS OF MODERN PHYSICS, 1979, 51 (02) :407-409