Sigma(+) and (Sigma)over-bar(-) Polarization in the J/psi and psi(3686) Decays
| dc.WoS.categories | Physics, Multidisciplinary | en_US |
| dc.authorid | 0000-0001-5050-8441 | en_US |
| dc.contributor.author | Çetin, Serkant Ali | |
| dc.date.accessioned | 2020-11-10T12:25:30Z | |
| dc.date.available | 2020-11-10T12:25:30Z | |
| dc.date.issued | 2020-07-31 | |
| dc.department | Fakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Enerji Sistemleri Mühendisliği Bölümü | en_US |
| dc.description | 8 pages | en_US |
| dc.description.abstract | From 1310.6 x 10(6) J/psi and 448.1 x 10(6) psi (3686) events collected with the BESIII experiment, we report the first observation of Sigma(+) and (Sigma) over bar (-) spin polarization in e(+)e(-) -> J/psi[psi(3686)] -> Sigma(+)(Sigma) over bar (-) decays. The relative phases of the form factors Delta Phi have been measured to be (-15.5 +/- 0.7 +/- 0.5)degrees and (21.7 +/- 4.0 +/- 0.8)degrees with J/psi and psi(3686) data, respectively. The nonzero value of Delta Phi allows for a direct and simultaneous measurement of the decay asymmetry parameters of Sigma(+)-> p pi(0) (alpha(0) = -0.998 +/- 0.037 +/- 0.009) and (Sigma) over bar (-)-> (p) over bar pi(0) ((alpha) over bar (0) = 0.990 +/- 0.037 +/- 0.011), the latter value being determined for the first time. The average decay asymmetry, (alpha(0 )- (alpha) over bar (0))/2, is calculated to be -0.994 +/- 0.004 +/- 0.002. The CP asymmetry A(CP,Sigma) = (alpha(0) + (alpha) over bar (0))/(alpha(0) - (alpha) over bar (0)) = -0.004 +/- 0.037 +/- 0.010 is extracted for the first time, and is found to be consistent with CP conservation. | en_US |
| dc.fullTextLevel | Full Text | en_US |
| dc.identifier.doi | 10.1103/PhysRevLett.125.052004 | en_US |
| dc.identifier.issn | 1079-7114 | |
| dc.identifier.issn | 0031-9007 | |
| dc.identifier.pmid | 32794879 | en_US |
| dc.identifier.scopus | 2-s2.0-85089491962 | en_US |
| dc.identifier.uri | https://hdl.handle.net/11411/2568 | |
| dc.identifier.uri | https://doi.org/10.1103/PhysRevLett.125.052004 | |
| dc.identifier.wos | WOS:000554413100002 | en_US |
| dc.identifier.wosquality | Q1 | en_US |
| dc.indekslendigikaynak | Web of Science | en_US |
| dc.indekslendigikaynak | Scopus | en_US |
| dc.indekslendigikaynak | PubMed | en_US |
| dc.issue | 5 | en_US |
| dc.language.iso | en | en_US |
| dc.national | International | en_US |
| dc.numberofauthors | 1000+ | en_US |
| dc.publisher | Amer Physical Soc. | en_US |
| dc.relation.ispartof | Physical Review Letters | 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 | Hyperon | en_US |
| dc.title | Sigma(+) and (Sigma)over-bar(-) Polarization in the J/psi and psi(3686) Decays | en_US |
| dc.type | Article | en_US |
| dc.volume | 125 | en_US |
