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QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi


Khodjamirian, A.; Mannel, T.; Melić, Blaženka
QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi // Physics letters. B, 571 (2003), 3-4; 75-84 doi:10.1016/j.physletb.2003.08.012 (međunarodna recenzija, članak, znanstveni)


Naslov
QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi

Autori
Khodjamirian, A. ; Mannel, T. ; Melić, Blaženka

Izvornik
Physics letters. B (0370-2693) 571 (2003), 3-4; 75-84

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

Ključne riječi
N/A

Sažetak
Employing the QCD light-cone sum rule approach we calculate the B -> pi pi hadronic matrix element of the current-current operator with c quarks in the penguin topology (``charming penguin''). The dominant contribution to the sum rule is due to the c-quark loop at short distances and is of O(alpha_s) with respect to the factorizable B -> pi pi amplitude. The effects of soft gluons are suppressed at least by O(alpha_s m_b^{; ; ; ; -2}; ; ; ; ). Our result indicates that sizable nonperturbative effects generated by charming penguins at finite m_b are absent. The same is valid for the penguin contractions of the current-current operators with light quarks.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
0098002

Ustanove
Institut "Ruđer Bošković", Zagreb

Autor s matičnim brojem:
Blaženka Melić, (181332)

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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