Naslov
Charmonia decay constants from the QCD lattice and QCD sum rules

Autori
Bečirević, Damir ; Duplančić, Goran ; Klajn, Bruno ; Melić, Blaženka ; Sanfillipo, Francesco

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Nuclear and Particle Physics Proceedings 273-275 / Aguilar-Benítez, M. ; Fuster, J. ; Martí-García, S. ; Santamaría, A. - : Elsevier, 2016, 1611-1617

Skup
37th International Conference on High Energy Physics (ICHEP)

Mjesto i datum
Valencia, Španjolska, 02.07.2014. - 09.07.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
charmonia; decay; QCD; lattice; sum rules

Sažetak
Using lattice QCD and QCD sum rules we compute the lowest state charmonia J^{;PC};=0^{;−+};(η_c), 1^{;−−};(J/ψ), and 1^{;+−};(h_c) decay constants. For calculating the decay constant of J/ψ we use both the vector and tensor currents and compare the results. Lattice QCD results are obtained from the unquenched (N_f=2) simulations using twisted mass QCD at four lattice spacings and taking the continuum limit. In the QCD sum rule calculation we apply the moment sum rules. We also comment the phenomenological implications of calculated charmonia decay constants in η_c→γγ decay, and B→X_{;c barc}; K decays.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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