Evidence for light-by-light scattering in ultraperipheral PbPb collisions at sNN=5.02TeV

Autor:	Carlo Battilana, Altan Cakir, Caglar Zorbilmez, Fabrizio Palla, Begona De la Cruz, Samet Lezki, José María Hernández Calama, Yalcin Guler, Sergei Shmatov, Francesco Fallavollita, David D'Enterria, Sergey Polikarpov, Ezio Torassa, Seon-Hee Seo, Tatyana Dimova, Maria Cruz Fouz Iglesias, Alexander Tapper, Cristina TUVE', Kevin Lannon, Mithat Kaya, Michael Tytgat, Maria Isabel Pedraza Morales, Mehmet Oglakci, Pierluigi Bortignon, Geoffrey Hall, Antonio Perez-Calero Yzquierdo, KEREM CANKOÇAK, Joao Seixas, FERHAT OZOK, Kadri Ozdemir, Mariana Shopova, EMINE GÜRPINAR GÜLER, Giacomo Sguazzoni
Rok vydání:	2019
Předmět:	Physics Nuclear and High Energy Physics Large Hadron Collider Photon 010308 nuclear & particles physics Scattering Astrophysics::High Energy Astrophysical Phenomena 01 natural sciences Light scattering Standard Model Nuclear physics Transverse plane Pseudorapidity 0103 physical sciences Transverse momentum High Energy Physics::Experiment Nuclear Experiment 010306 general physics
Zdroj:	Nuclear Physics A. 982:791-794
ISSN:	0375-9474
Popis:	Evidence for light-by-light (LbL) scattering, gamma gamma -> gamma gamma, in ultraperipheral PbPb collisions at a nucleon-nucleon center of-mass energy of 5.02 TeV is reported. LbL scattering processes are selected in events with just two photons produced, with transverse energy E-T(gamma) > 2 GeV, pseudorapidity vertical bar eta(gamma)vertical bar 5 GeV, transverse momentum p(T)(gamma gamma) gamma gamma) = 122 +/- 46 (stat) +/- 29 (syst) +/- 4 (theo) nb is consistent with the standard model prediction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bd5fe294134f72a860e1b08853a08250 https://doi.org/10.1016/j.nuclphysa.2018.10.018 Zobrazit plný text záznamu Full Text from ScienceDirect