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Coherent ψ(2S) photo-production in ultra-peripheral Pb–Pb collisions at √sNN=2.76 TeV
- Author(s): Adam, J
- Adamová, D
- Aggarwal, MM
- Aglieri Rinella, G
- Agnello, M
- Agrawal, N
- Ahammed, Z
- Ahn, SU
- Aimo, I
- Aiola, S
- Ajaz, M
- Akindinov, A
- Alam, SN
- Aleksandrov, D
- Alessandro, B
- Alexandre, D
- Alfaro Molina, R
- Alici, A
- Alkin, A
- Alme, J
- Alt, T
- Altinpinar, S
- Altsybeev, I
- Alves Garcia Prado, C
- Andrei, C
- Andronic, A
- Anguelov, V
- Anielski, J
- Antičić, T
- Antinori, F
- Antonioli, P
- Aphecetche, L
- Appelshäuser, H
- Arcelli, S
- Armesto, N
- Arnaldi, R
- Aronsson, T
- Arsene, IC
- Arslandok, M
- Augustinus, A
- Averbeck, R
- Azmi, MD
- Bach, M
- Badalà, A
- Baek, YW
- Bagnasco, S
- Bailhache, R
- Bala, R
- Baldisseri, A
- Baltasar Dos Santos Pedrosa, F
- Baral, RC
- Barbano, AM
- Barbera, R
- Barile, F
- Barnaföldi, GG
- Barnby, LS
- Barret, V
- Bartalini, P
- Barth, K
- Bartke, J
- Bartsch, E
- Basile, M
- Bastid, N
- Basu, S
- Bathen, B
- Batigne, G
- Batista Camejo, A
- Batyunya, B
- Batzing, PC
- Bearden, IG
- Beck, H
- Bedda, C
- Behera, NK
- Belikov, I
- Bellini, F
- Bello Martinez, H
- Bellwied, R
- Belmont, R
- Belmont-Moreno, E
- Belyaev, V
- Bencedi, G
- Beole, S
- Berceanu, I
- Bercuci, A
- Berdnikov, Y
- Berenyi, D
- Bertens, RA
- Berzano, D
- Betev, L
- Bhasin, A
- Bhat, IR
- Bhati, AK
- Bhattacharjee, B
- Bhom, J
- Bianchi, L
- et al.
Published Web Location
https://doi.org/10.1016/j.physletb.2015.10.040Abstract
© 2015 CERN for the benefit of the ALICE Collaboration We have performed the first measurement of the coherent ψ(2S) photo-production cross section in ultra-peripheral Pb–Pb collisions at the LHC. This charmonium excited state is reconstructed via the ψ(2S)→l+l−and ψ(2S)→J/ψπ+π−decays, where the J/ψ decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about 22 μb−1. The cross section for coherent ψ(2S) production in the rapidity interval −0.9