Inclusive J/ψ production at forward and backward rapidity in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=8.16 $$ TeV

• Published in: The journal of high energy physics 2018-07, Vol.2018 (7), Article 160
• Main Authors: Acharya, S., Acosta, F. T.-., Adamová, D., Adolfsson, J., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., Ahn, S. U., Aiola, S., Akindinov, A., Al-Turany, M., Alam, S. N., Albuquerque, D. S. D., Aleksandrov, D., Alessandro, B., Alfaro Molina, R., Ali, Y., Alici, A., Alkin, A., Alme, J., Alt, T., Altenkamper, L., Altsybeev, I., Andrei, C., Andreou, D., Andrews, H. A., Andronic, A., Angeletti, M., Anguelov, V., Anson, C., Antičić, T., Antinori, F., Antonioli, P., Anwar, R., Apadula, N., Aphecetche, L., Appelshäuser, H., Arcelli, S., Arnaldi, R., Arnold, O. W., Arsene, I. C., Arslandok, M., Audurier, B., Augustinus, A., Averbeck, R., Azmi, M. D., Badalà, A., Baek, Y. W., Bagnasco, S., Bailhache, R., Bala, R., Baldisseri, A., Ball, M., Baral, R. C., Barbano, A. M., Barbera, R., Barile, F., Barioglio, L., Barnaföldi, G. G., Barnby, L. S., Barret, V., Bartalini, P., Barth, K., Bartsch, E., Bastid, N., Basu, S., Batigne, G., Batyunya, B., Batzing, P. C., Bazo Alba, J. L., Bearden, I. G., Beck, H., Bedda, C., Behera, N. K., Belikov, I., Bellini, F., Bello Martinez, H., Bellwied, R., Beltran, L. G. E., Belyaev, V., Bencedi, G., Beole, S., Bercuci, A., Berdnikov, Y., Berenyi, D., Bertens, R. A., Berzano, D., Betev, L., Bhaduri, P. P., Bhasin, A., Bhat, I. R., Bhatt, H., Bhattacharjee, B., Bhom, J., Bianchi, A., Bianchi, L., Bianchi, N., Bielčík, J.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Nuclear Experiment; Physics
• ISSN: 1029-8479; 1126-6708; 1029-8479
• DOI: 10.1007/JHEP07(2018)160

Inclusive J/ ψ production is studied in p-Pb interactions at a centre-of-mass energy per nucleon-nucleon collision $$ \sqrt{s_{\mathrm{NN}}}=8.16 $$ s N N = 8.16 TeV, using the ALICE detector at the CERN LHC. The J/ ψ meson is reconstructed, via its decay to a muon pair, in the centre-of-mass rapidity intervals 2.03 < y cms < 3.53 and −4.46 < y cms < −2.96, where positive and negative y cms refer to the p-going and Pb-going direction, respectively. The transverse momentum coverage is p T < 20 GeV/ c . In this paper, y cms - and p T -differential cross sections for inclusive J/ ψ production are presented, and the corresponding nuclear modification factors R pPb are shown. Forward results show a suppression of the J/ ψ yield with respect to pp collisions, concentrated in the region p T ≲ 5 GeV/ c . At backward rapidity no significant suppression is observed. The results are compared to previous measurements by ALICE in p-Pb collisions at $$ \sqrt{s_{\mathrm{NN}}}=5.02 $$ s N N = 5.02 TeV and to theoretical calculations. Finally, the ratios R FB between forward- and backward- y cms R pPb values are shown and discussed.