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

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Polje Vrijednost
 
Relacija http://fulir.irb.hr/546/
http://www.sciencedirect.com/science/article/pii/S0370269303012632
10.1016/j.physletb.2003.08.021
 
Naslov QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi
 
Autor Khodjamirian, A.
Mannel, Th.
Melić, Blaženka
 
Tema Physics
 
Opis Employing the QCD light-cone sum rule approach we calculate the B --> pipi 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 --> pipi 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 mb are absent. The same is valid for the penguin contractions of the current-current operators with light quarks. (C) 2003 Elsevier B.V. All rights reserved.
 
Izdavač Elsevier
 
Datum 2003-10-23
 
Vrsta resursa Article
PeerReviewed
 
Format (na primjer PDF) application/pdf
 
Jezik en
english
 
Prava
 
Identifikator http://fulir.irb.hr/546/1/QCD_light-cone_sum_rule.pdf
Khodjamirian, A. and Mannel, Th. and Melić, Blaženka (2003) QCD light-cone sum rule estimate of charming penguin contributions in B -> pi pi Physics Letters B, 572 (3-4). pp. 171-180. ISSN 0370-2693