Pregled bibliografske jedinice broj: 1060671
Charmonia decay constants from lattice QCD and QCD sum rules
Charmonia decay constants from lattice QCD and QCD sum rules // 37th International Conference on High Energy Physics (ICHEP2014),
Valencia, Španjolska, 2014. (pozvano predavanje, podatak o recenziji nije dostupan, pp prezentacija, znanstveni)
CROSBI ID: 1060671 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Charmonia decay constants from lattice QCD and QCD sum rules
Autori
Melić, Blaženka
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, pp prezentacija, znanstveni
Skup
37th International Conference on High Energy Physics (ICHEP2014),
Mjesto i datum
Valencia, Španjolska, 02.07.2014. - 09.07.2014
Vrsta sudjelovanja
Pozvano predavanje
Vrsta recenzije
Podatak o recenziji nije dostupan
Ključne riječi
charmonia, decay constants, sum rules
Sažetak
We compute the decay constants of the lowest ccbar-states with quantum numbers J(PC)=0(-+) [eta_c], 1(--) [J/psi], and 1(+-) [hc] by using lattice QCD and QCD sum rules. We consider the coupling of J/psi to both the vector and tensor currents. Lattice QCD results are obtained from the unquenched (Nf=2) simulations using twisted mass QCD at four lattice spacings, allowing us to take the continuum limit. On the QCD sum rule side we use the moment sum rules. The results are then used to discuss the rate of eta_c --> gamma gamma decay, and to comment on the factorization in B --> X K decays, with X being either eta_c or J/psi.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
