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- Publisher Website: 10.1103/PhysRevLett.123.052001
- Scopus: eid_2-s2.0-85071896312
- PMID: 31491300
- WOS: WOS:000479003100006
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Article: Observation of Light-by-Light Scattering in Ultraperipheral Pb + Pb Collisions with the ATLAS Detector
| Title | Observation of Light-by-Light Scattering in Ultraperipheral Pb + Pb Collisions with the ATLAS Detector |
|---|---|
| Authors | |
| Keywords | Germanium compounds Light scattering |
| Issue Date | 2019 |
| Publisher | American Physical Society. The Journal's web site is located at https://journals.aps.org/prl/ |
| Citation | Physical Review Letters, 2019, v. 123 n. 5, p. article no. 052001 How to Cite? |
| Abstract | This Letter describes the observation of the light-by-light scattering process, γγ→γγ, in Pb+Pb collisions at sNN=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 ETγ>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. © 2019 CERN. |
| Persistent Identifier | http://hdl.handle.net/10722/275141 |
| ISSN | 2023 Impact Factor: 8.1 2023 SCImago Journal Rankings: 3.040 |
| ISI Accession Number ID |
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | LO, CY | - |
| dc.contributor.author | Paredes Hernandez, D | - |
| dc.contributor.author | Tu, Y | - |
| dc.contributor.author | ATLAS Collaboration | - |
| dc.contributor.author | Pizzimento, L | - |
| dc.date.accessioned | 2019-09-10T02:36:22Z | - |
| dc.date.available | 2019-09-10T02:36:22Z | - |
| dc.date.issued | 2019 | - |
| dc.identifier.citation | Physical Review Letters, 2019, v. 123 n. 5, p. article no. 052001 | - |
| dc.identifier.issn | 0031-9007 | - |
| dc.identifier.uri | http://hdl.handle.net/10722/275141 | - |
| dc.description.abstract | This Letter describes the observation of the light-by-light scattering process, γγ→γγ, in Pb+Pb collisions at sNN=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 ETγ>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. © 2019 CERN. | - |
| dc.language | eng | - |
| dc.publisher | American Physical Society. The Journal's web site is located at https://journals.aps.org/prl/ | - |
| dc.relation.ispartof | Physical Review Letters | - |
| dc.rights | Physical Review Letters. Copyright © American Physical Society. | - |
| dc.rights | Copyright [2019] by The American Physical Society. This article is available online at [http://dx.doi.org/10.1103/PhysRevLett.123.052001]. | - |
| dc.subject | Germanium compounds | - |
| dc.subject | Light scattering | - |
| dc.title | Observation of Light-by-Light Scattering in Ultraperipheral Pb + Pb Collisions with the ATLAS Detector | - |
| dc.type | Article | - |
| dc.identifier.email | Paredes Hernandez, D: dparedes@hku.hk | - |
| dc.identifier.email | Tu, Y: yanjuntu@hku.hk | - |
| dc.identifier.authority | Tu, Y=rp01971 | - |
| dc.description.nature | published_or_final_version | - |
| dc.identifier.doi | 10.1103/PhysRevLett.123.052001 | - |
| dc.identifier.pmid | 31491300 | - |
| dc.identifier.scopus | eid_2-s2.0-85071896312 | - |
| dc.identifier.hkuros | 304191 | - |
| dc.identifier.volume | 123 | - |
| dc.identifier.issue | 5 | - |
| dc.identifier.spage | article no. 052001 | - |
| dc.identifier.epage | article no. 052001 | - |
| dc.identifier.isi | WOS:000479003100006 | - |
| dc.publisher.place | United States | - |
| dc.identifier.issnl | 0031-9007 | - |