Observation of a narrow mass state decaying into Υ(1S)+γ in ppˉ collisions at √s=1.96 TeV

0384616 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš … celkem 394 autorů
Observation of a narrow mass state decaying into Υ(1S)+γ in ppˉ collisions at √s=1.96 TeV.
Physical Review D: Particles, Fields, Gravitation and Cosmology. Roč. 86, č. 3 (2012), "031103-1"-"031103-6". ISSN 1550-7998
Grant CEP: GA MŠMT LA08047; GA MŠMT(CZ) LG12006
Výzkumný záměr: CEZ:AV0Z10100502
Klíčová slova: D0 * Tevatron * anti-p p * new particle * chi mesons * resonance * radiative decay
Kód oboru RIV: BF - Elementární částice a fyzika vys. energií
Impakt faktor: 4.691, rok: 2012
http://prd.aps.org/abstract/PRD/v86/i3/e031103

Using data corresponding to an integrated luminosity of 1.3 fb^-1, we observe a narrow mass state decaying into Upsilon(1S)+gamma, where the Upsilon(1S) meson is detected by its decay into a pair of oppositely charged muons, and the photon is identified through its conversion into an electron-positron pair. The significance of this observation is 5.6 standard deviations. The mass of the state is centered at 10.551 /pm 0.014 (stat.) /pm 0.017 (syst.) GeV/c^2, which is consistent with that of the state recently observed by the ATLAS Collaboration.
Trvalý link: http://hdl.handle.net/11104/0214200