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Observation of the rare B-s(0)->mu(+)mu(-) decay from the combined analysis of CMS and LHCb data


Khachatryan, V.; ...; Morović, Srećko; Ferenček, Dinko; Đurić, Senka; ...; Pesen, E
Observation of the rare B-s(0)->mu(+)mu(-) decay from the combined analysis of CMS and LHCb data // Nature, 522 (2015), 68-72 doi:10.1038/nature14474 (međunarodna recenzija, pismo, znanstveni)


Naslov
Observation of the rare B-s(0)->mu(+)mu(-) decay from the combined analysis of CMS and LHCb data

Autori
Khachatryan, V. ; ... ; Morović, Srećko ; Ferenček, Dinko ; Đurić, Senka ; ... ; Pesen, E

Izvornik
Nature (0028-0836) 522 (2015); 68-72

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, pismo, znanstveni

Ključne riječi
High energy physics ; Experimental particle physics ; LHC ; CMS ; Standard Model

Sažetak
A joint measurement is presented of the branching fractions the combined analysis of CMS and LHCb data $B^0_s\to\mu^+\mu^-$ and $B^0\to\mu^+\mu^-$ in proton- proton collisions at the LHC by the CMS and LHCb experiments. The data samples were collected in 2011 at a centre-of-mass energy of 7 TeV, and in 2012 at 8 TeV. The combined analysis produces the first observation of the $B^0_s\to\mu^+\mu^-$ decay, with a statistical significance exceeding six standard deviations, and the best measurement of its branching fraction so far. Furthermore, evidence for the $B^0\to\mu^+\mu^-$ decay is obtained with a statistical significance of three standard deviations. The branching fraction measurements are statistically compatible with SM predictions and impose stringent constraints on several theories beyond the SM.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
HRZZ-IP-2013-11-7118 - Mjerenje svojstava Higgsovog bozona i potraga za novom fizikom detektorom CMS (Ivica Puljak, )
HRZZ-IS-09.01/346 - Potraga za novim standardnim modelom elementarnih čestica na LHC-u: od preciznih mjerenja elektroslabih procesa do direktnih potraga za novom fizikom (Vuko Brigljević, )

Ustanove
Fakultet elektrotehnike, strojarstva i brodogradnje, Split,
Institut "Ruđer Bošković", Zagreb,
Prirodoslovno-matematički fakultet, Split

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • MEDLINE


Citati