| dc.creator | Alconada Verzini, María Josefina | |
| dc.creator | Alonso, Francisco | |
| dc.creator | Arduh, Francisco Anuar | |
| dc.creator | Dova, María Teresa | |
| dc.creator | Hoya, Joaquín | |
| dc.creator | Monticelli, Fernando Gabriel | |
| dc.creator | Orellana, Gonzalo Enrique | |
| dc.creator | Wahlberg, Hernán Pablo | |
| dc.creator | The ATLAS Collaboration | |
| dc.date | 2019-08 | |
| dc.date | 2022-12-14T15:13:40Z | |
| dc.date.accessioned | 2023-07-15T05:13:07Z | |
| dc.date.available | 2023-07-15T05:13:07Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/147258 | |
| dc.identifier | issn:1079-7114 | |
| dc.identifier | issn:0031-9007 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/7472529 | |
| dc.description | This Letter describes the observation of the light-by-light scattering process, γγ→γγ, in Pb+Pb collisions at √s<sub>NN</sub> = 5.02 TeV. The analysis is conducted using a data sample corresponding to an integrated luminosity of 1.73 nb⁻¹, collected in November 2018 by the ATLAS experiment at the LHC. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy Eᵞ<sub>T</sub> > 3 GeV and pseudorapidity |ηᵧ|<2.4, diphoton invariant mass above 6 GeV, and small diphoton transverse momentum and acoplanarity. After applying all selection criteria, 59 candidate events are observed for a background expectation of 12±3 events. The observed excess of events over the expected background has a significance of 8.2 standard deviations. The measured fiducial cross section is 78±13(stat)±7(syst)±3(lumi) nb. | |
| dc.description | La lista completa de autores que integran el documento puede consultarse en el archivo. | |
| dc.description | Instituto de Física La Plata | |
| dc.format | application/pdf | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by/4.0/ | |
| dc.rights | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Física | |
| dc.subject | relativistic heavy-ion collisions | |
| dc.subject | light-by-light scattering | |
| dc.title | Observation of Light-by-Light Scattering in Ultraperipheral Pb + Pb Collisions with the ATLAS Detector | |
| dc.type | Articulo | |
| dc.type | Articulo | |
