Evidence For Light-By-Light Scattering İn Ultraperipheral Pbpb Collisions At? Snn = 5.02 Tev
| dc.authorid | 249433 | en_US |
| dc.contributor.author | Bilki, Burak | |
| dc.contributor.author | ., ve diğer. | |
| dc.date.accessioned | 2019-12-29T11:45:18Z | |
| dc.date.available | 2019-12-29T11:45:18Z | |
| dc.date.issued | 2019 | |
| dc.department | İstanbul Beykent Üniversitesi | en_US |
| dc.description.abstract | Evidence for light-by-light (LbL) scattering, ?? ? ??, in ultraperipheral PbPb collisions at a nucleon-nucleon centerof- 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 > 2 GeV, pseudorapidity |??| < 2.4; and diphoton invariant mass m?? > 5 GeV, transverse momentum p?? T < 1 GeV, and acoplanarity (1 ? ????/?) < 0.01. After all selection criteria, 14 events are observed, compared to 11.1 ± 1.1 (theo) and 3.8 ± 1.3 (stat) events expected for signal and background processes respectively. The significance of the signal excess over the background-only hypothesis is 4.1?. The measured fiducial LbL scattering cross section, ?fid(?? ? ??) = 122 ± 46 (stat) ±29 (syst) ±4 (theo) nb is consistent with the standard model prediction | en_US |
| dc.identifier.citation | Nuclear Physics A 982 (2019) 791–794 | en_US |
| dc.identifier.doi | 10.1016/j.nuclphysa.2018.10.018 | |
| dc.identifier.issn | 0375-9474 | |
| dc.identifier.scopusquality | Q2 | en_US |
| dc.identifier.uri | https://doi.org/10.1016/j.nuclphysa.2018.10.018 | |
| dc.identifier.wos | WOS:000457515500183 | en_US |
| dc.identifier.wosquality | Q2 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | The CMS Collaboration | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.subject | Light-by-light scattering | en_US |
| dc.subject | Heavy ions | en_US |
| dc.subject | Ultraperipheral collisions | en_US |
| dc.subject | CMS | en_US |
| dc.subject | LHC | en_US |
| dc.title | Evidence For Light-By-Light Scattering İn Ultraperipheral Pbpb Collisions At? Snn = 5.02 Tev | en_US |
| dc.type | Article | en_US |
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