Measurement of B(J/psi -> eta ' e(+)e(-)) and search for a dark photon
| dc.WoS.categories | Astronomy & Astrophysics; Physics, Particles & Fields | en_US |
| dc.authorid | 0000-0001-5050-8441 | en_US |
| dc.contributor.author | Çetin, Serkant Ali | |
| dc.date.accessioned | 2021-02-11T06:24:18Z | |
| dc.date.available | 2021-02-11T06:24:18Z | |
| dc.date.issued | 2019-01-28 | |
| dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümü | en_US |
| dc.description.abstract | Using a data sample of (1310.6 +/- 7.0) x 10(6) J/psi decay events collected with the BESIII detector at BEPCII, we study the electromagnetic Dalitz decay J/psi -> eta ' e(+)e(-) with two dominant eta' decay modes, eta' -> gamma pi(+)pi(-) and eta' -> pi(+)pi(-)eta . The branching fraction is determined to be B(J/psi -> eta ' e(+)e(-)) = (6.59 +/- 0.07 +/- 0.17) x 10(-5), which improves in precision by a factor of 2 over the previous BESIII measurement. A search for the dark photon (gamma') is performed via J/psi -> eta'gamma',gamma' -> e(+)e(-). Excluding the w and phi mass regions, no significant signal is observed in the mass range from 0.1 to 2.1 GeV/e2. We set upper limits at the 90% confidence level on B(J/psi -> eta 'gamma') x B(gamma' -> e(+)e(-)), B(J/psi -> eta 'gamma') and the mixing strength as a function of dark photon mass. This is among the first searches for dark photons in charmonium decays. | en_US |
| dc.fullTextLevel | Full Text | en_US |
| dc.identifier.doi | 10.1103/PhysRevD.99.012013 | |
| dc.identifier.issn | 2470-0029 | |
| dc.identifier.issn | 2470-0010 | |
| dc.identifier.scopus | 2-s2.0-85061101368 | en_US |
| dc.identifier.uri | https://hdl.handle.net/11411/3233 | |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevD.99.012013 | |
| dc.identifier.wos | WOS:000456798900002 | en_US |
| dc.identifier.wosquality | Q1 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.issue | 1 | en_US |
| dc.language.iso | en | en_US |
| dc.national | International | en_US |
| dc.numberofauthors | 50+ | en_US |
| dc.publisher | AMER PHYSICAL SOC | en_US |
| dc.relation.ispartof | PHYSICAL REVIEW D | en_US |
| dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
| dc.rights | info:eu-repo/semantics/openAccess | en_US |
| dc.subject | MESON DECAYS | en_US |
| dc.subject | VECTOR BOSON | en_US |
| dc.subject | U-GAMMA | en_US |
| dc.subject | E(+)E(-) | en_US |
| dc.subject | PHI | en_US |
| dc.subject | ETA-E(+)E(-) | en_US |
| dc.subject | DETECTOR | en_US |
| dc.subject | LIMIT | en_US |
| dc.subject | OMEGA | en_US |
| dc.title | Measurement of B(J/psi -> eta ' e(+)e(-)) and search for a dark photon | |
| dc.type | Article | |
| dc.volume | 99 | en_US |
