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Pregled bibliografske jedinice broj: 121064

Časopis

Autori: Khodjamirian, A.; Mannel, T.; Melić, Blaženka
Naslov: QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi
Izvornik: Physics letters. B (0370-2693) 571 (2003), 3-4; 75-84
Vrsta rada: članak
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.
Projekt / tema: 0098002
Izvorni jezik: ENG
Rad je indeksiran u
bazama podataka:
Current Contents Connect (CCC)
Scopus
SCI-EXP, SSCI i/ili A&HCI
Science Citation Index Expanded (SCI-EXP) (sastavni dio Web of Science Core Collectiona)
Kategorija: Znanstveni
Znanstvena područja:
Fizika
URL Internet adrese: http://fulir.irb.hr/546/1/QCD_light-cone_sum_rule.pdf
http://arxiv.org/abs/hep-ph/0304179
Broj citata:
Altmetric:
DOI: 10.1016/j.physletb.2003.08.012
URL cjelovitog teksta:
Google Scholar: QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi



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