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Lattice QCD and QCD sum rule determination of the decay constants of ηc, J/ψ and hc states


Bečirević, Damir; Duplančić, Goran; Klajn, Bruno; Melić, Blaženka; Sanfilippo, Francesco
Lattice QCD and QCD sum rule determination of the decay constants of ηc, J/ψ and hc states // Nuclear physics. B, 883 (2014), 306-327 doi:10.1016/j.nuclphysb.2014.03.024 (međunarodna recenzija, članak, znanstveni)


Naslov
Lattice QCD and QCD sum rule determination of the decay constants of ηc, J/ψ and hc states

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

Izvornik
Nuclear physics. B (0550-3213) 883 (2014); 306-327

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

Ključne riječi
Lattice QCD ; QCD sum rules ; charmonia

Sažetak
We compute the decay constants of the lowest View the cc¯-states with quantum numbers JPC=0−+(ηc), 1−− (J/ψ), and 1+−(hc) by using lattice QCD and QCD sum rules. We consider the coupling of J/ψ 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 ηc→γγ decay, and to comment on the factorization in View the B→Xcc K decays, with Xcc being either ηc or J/ψ.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
098-0982930-2864 - Fundamentalne interakcije u fizici elementarnih čestica i kozmologiji (Goran Duplančić, )

Ustanove
Institut "Ruđer Bošković", Zagreb

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
  • Scopus


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