@article{3187578, title = "Coherent J/psi photoproduction at forward rapidity in ultra-peripheral Pb-Pb collisions at root s(NN)=5.02 TeV", author = "Acharya, S. and Adamova, D. and Adhya, S. P. and Adler, A. and and Adolfsson, J. and Aggarwal, M. M. and Rinella, G. Aglieri and Agnello, and M. and Agrawal, N. and Ahammed, Z. and Ahmad, S. and Ahn, S. U. and and Aiola, S. and Akindinov, A. and Al-Turany, M. and Alam, S. N. and and Albuquerque, D. S. D. and Aleksandrov, D. and Alessandro, B. and and Alfanda, H. M. and Alfaro Molina, R. and Ali, B. and Ali, Y. and Alici, and A. and Alkin, A. and Alme, J. and Alt, T. and Altenkamper, L. and and Altsybeev, I and Anaam, M. N. and Andrei, C. and Andreou, D. and and Andrews, H. A. and Andronic, A. and Angeletti, M. and Anguelov, V and and Anson, C. and Anticic, T. and Antinori, F. and Antonioli, P. and Anwar, and R. and Apadula, N. and Aphecetche, L. and Appelshaeuser, H. and Arcelli, and S. and Arnaldi, R. and Arratia, M. and Arsene, I. C. and Arslandok, M. and and Augustinus, A. and Averbeck, R. and Aziz, S. and Azmi, M. D. and and Badala, A. and Baek, Y. W. and Bagnasco, S. and Bai, X. and Bailhache, and R. and Bala, R. and Baldisseri, A. and Ball, M. and Baral, R. C. and and Barbera, R. and Barioglio, L. and Barnafoldi, G. G. and Barnby, L. S. and and Barret, V and Bartalini, P. and Barth, K. and Bartsch, E. and and Baruffaldi, F. and Bastid, N. and Basu, S. and Batigne, G. and Batyunya, and B. and Batzing, P. C. and Bauri, D. and Bazo Alba, J. L. and Bearden, I. and G. and Bedda, C. and Behera, N. K. and Belikov, I and Bellini, F. and and Bellwied, R. and Belyaev, V and Bencedi, G. and Beole, S. and Bercuci, and A. and Berdnikov, Y. and Berenyi, D. and Bertens, R. A. and Berzano, D. and and Betev, L. and Bhasin, A. and Bhat, I. R. and Bhatt, H. and and Bhattacharjee, B. and Bianchi, A. and Bianchi, L. and Bianchi, N. and and Bielcik, J. and Bielcikova, J. and Bilandzic, A. and Biro, G. and and Biswas, R. and Biswas, S. and Blair, J. T. and Blau, D. and Blume, C. and and Boca, G. and Bock, F. and Bogdanov, A. and Boldizsar, L. and and Bolozdynya, A. and Bombara, M. and Bonomi, G. and Bonora, M. and Borel, and H. and Borissov, A. and Borri, M. and Bossi, H. and Botta, E. and and Bourjau, C. and Bratrud, L. and Braun-Munzinger, P. and Bregant, M. and and Broker, T. A. and Broz, M. and Brucken, E. J. and Bruna, E. and Bruno, and G. E. and Buckland, M. D. and Budnikov, D. and Buesching, H. and and Bufalino, S. and Bugnon, O. and Buhler, P. and Buncic, P. and Busch, O. and and Buthelezi, Z. and Butt, J. B. and Buxton, J. T. and Caffarri, D. and and Caliva, A. and Calvo Villar, E. and Camacho, R. S. and Camerini, P. and and Capon, A. A. and Carnesecchi, F. and Castellanos, J. Castillo and and Castro, A. J. and Casula, E. A. R. and Catalano, F. and Sanchez, C. and Ceballos and Chakraborty, P. and Chandra, S. and Chang, B. and Chang, W. and and Chapeland, S. and Chartier, M. and Chattopadhyay, S. and Chauvin, A. and and Cheshkov, C. and Cheynis, B. and Barroso, V. Chibante and and Chinellato, D. D. and Cho, S. and Chochula, P. and Chowdhury, T. and and Christakoglou, P. and Christensen, C. H. and Christiansen, P. and Chujo, and T. and Cicalo, C. and Cifarelli, L. and Cindolo, F. and Cleymans, J. and and Colamaria, F. and Colella, D. and Collu, A. and Colocci, M. and Concas, and M. and Balbastre, G. Conesa and del Valle, Z. Conesa and Contin, G. and and Contreras, J. G. and Cormier, T. M. and Morales, Y. Corrales and and Cortese, P. and Cosentino, M. R. and Costa, F. and Costanza, S. and and Crkovska, J. and Crochet, P. and Cuautle, E. and Cunqueiro, L. and and Dabrowski, D. and Dahms, T. and Dainese, A. and Damas, F. P. A. and and Dani, S. and Danisch, M. C. and Danu, A. and Das, D. and Das, I and Das, and S. and Dash, A. and Dash, S. and Dashi, A. and De, S. and DeCaro, A. and and DeCataldo, G. and DeConti, C. and DeCuveland, J. and DeFalco, A. and and DeGruttola, D. and DeMarco, N. and DePasquale, S. and DeSouza, R. D. and and Deb, S. and Degenhardt, H. F. and Deisting, A. and Deja, K. R. and and Deloff, A. and Delsanto, S. and Dhankher, P. and Di Bari, D. and Di and Mauro, A. and Diaz, R. A. and Dietel, T. and Dillenseger, P. and Ding, and Y. and Divia, R. and Djuvsland, O. and Dmitrieva, U. and Dobrin, A. and and Doenigus, B. and Dordic, O. and Dubey, A. K. and Dubla, A. and Dudi, S. and and Dukhishyam, M. and Dupieux, P. and Ehlers, R. J. and Elia, D. and and Engel, H. and Epple, E. and Erazmus, B. and Erhardt, F. and Erokhin, A. and and Ersdal, M. 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B. and Zinovjev, G. and Zurlo, N. and ALICE and Collaboration", journal = "PHYSICS LETTERS B", year = "2019", volume = "798", publisher = "Elsevier", issn = "0370-2693", doi = "10.1016/j.physletb.2019.134926", abstract = "The ALICE collaboration performed the first rapidity-differential measurement of coherent J/psi photoproduction in ultra-peripheral Pb-Pbcollisions at a center-of-mass energy root s(NN) = 5.02TeV. The J/psi is detected via its dimuon decay in the forward rapidity region (-4.0 < y < -2.5) for events where the hadronic activity is required to be minimal. The analysis is based on an event sample corresponding to an integrated luminosity of about 750 mu b(-1). The cross section for coherent J/psi production is presented in six rapidity bins. The results are compared with theoretical models for coherent J/psi photoproduction. These comparisons indicate that gluon shadowing effects play a role in the photoproduction process. The ratio of psi' to J/psi coherent photoproduction cross sections was measured and found to be consistent with that measured for photoproduction off protons. (C) 2019 The Author. Published by Elsevier B.V." }