Ikaros I.Y. Bigi
University of Notre Dame
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Featured researches published by Ikaros I.Y. Bigi.
Nuclear Physics | 1981
Ikaros I.Y. Bigi; A.I. Sanda
Abstract We describe a general method of exposing CP violations in on-shell transitions of B mesons. Such CP asymmetries can reach values of the order of up to 10% within the Kobayashi-Maskawa model for plausible values of the model parameters. Our discussion focuses on those (mainly non-leptonic) decay modes which carry the promise of exhibiting clean and relatively large CP asymmetries at the expense of a reduction in counting rates. Accordingly we address the complexities encountered when performing cP tests with a high statistics B meson factory like the Z0 (and a toponium) resonance.
International Journal of Modern Physics A | 2009
D. M. Asner; T. Barnes; Jianming Bian; Ikaros I.Y. Bigi; N. Brambilla; I. Boyko; V. Bytev; K. T. Chao; J. Charles; Haiyun Chen; J. C. Chen; Y. B. Chen; Y. Q. Chen; Hai-Yang Cheng; Dmitry Dedovich; S. Descotes-Genon; C.D. Fu; X. Garcia I Tormo; Yuanning Gao; K. L. He; Z. G. He; J. F. Hu; H. M. Hu; B. Huang; Y. Jia; H. Y. Jin; S. Jin; Yu-Ping Kuang; H. Lacker; H. B. Li
We give a detailed review of the construction of gauge invariant Lagrangians for free and interacting higher spin fields using the BRST approach developed over the past few years.This physics book provides detailed discussions on important topics in
European Physical Journal C | 2008
M. Raidal; A. van der Schaaf; Ikaros I.Y. Bigi; M. Mangano; Y. Semertzidis; S. Abel; S. Albino; S. Antusch; E. Arganda; B. Bajc; Subhas Banerjee; Carla Biggio; M. Blanke; W. Bonivento; G.C. Branco; D. Bryman; Andrzej J. Buras; L. Calibbi; A. Ceccucci; Piotr H. Chankowski; Sacha Davidson; Aldo Deandrea; David DeMille; F. Deppisch; M. A. Diaz; B. Duling; Marta Felcini; W. Fetscher; F. Forti; D. K. Ghosh
\tau
Physics Letters B | 1992
Ikaros I.Y. Bigi; Nikolai Uraltsev; A.I. Vainshtein
-charm physics that will be explored during the next few years at \bes3 . Both theoretical and experimental issues are covered, including extensive reviews of recent theoretical developments and experimental techniques. Among the subjects covered are: innovations in Partial Wave Analysis (PWA), theoretical and experimental techniques for Dalitz-plot analyses, analysis tools to extract absolute branching fractions and measurements of decay constants, form factors, and CP-violation and \DzDzb-oscillation parameters. Programs of QCD studies and near-threshold tau-lepton physics measurements are also discussed.
Physics Letters B | 1986
Ikaros I.Y. Bigi; Yuri L. Dokshitzer; V. A. Khoze; Johann H. Kuhn; P.M. Zerwas
This chapter of the report of the “Flavor in the era of the LHC” Workshop discusses the theoretical, phenomenological and experimental issues related to flavor phenomena in the charged lepton sector and in flavor conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavor structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the standard model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.
Physical Review D | 1994
Ikaros I.Y. Bigi; Mikhail A. Shifman; Nikolai Uraltsev; A.I. Vainshtein
Abstract We present a self-consistent method for treating nonperturbative effects in inclusive nonleptonic and semileptonic decays of heavy flavour hadrons. These effects give rise to powerlike corrections ∝ 1 m Q n with n ⩾ 2. The leading correction to the semileptonic branching ratio occurs for n = 2. It is expressed in terms of the vector-pseudoscalar mass splitting: δ BR sl BR sl ≅ BR nl · 6 [ (M v 2 −M p 2 ) m Q 2 ](c + 2 −c − 2 ) 2N c and yields a reduction of BR sl . This nonperturbative correction contributes to the nonleptonic width with a sign opposite to that of the perturbative terms that are non-leading in 1 N c . In beauty decays the former reduces the latter by 20% whereas in charm decays they more or less cancel. This leads to a reduction of BR sl by no more than 10% in beauty decays and by a factor of roughly two in charm decays. Phenomenological models of heavy flavour decays are unable to mimic these leading corrections by a specific choice of quark masses or by invoking Fermi motion.We present a selfconsistent method for treating nonperturbative effects in inclusive nonleptonic and semileptonic decays of heavy flavour hadrons. These effects give rise to powerlike corrections
International Journal of Modern Physics A | 1994
Ikaros I.Y. Bigi; M. Shifman; Nikolai Uraltsev; A.I. Vainshtein
\propto 1/m_Q^n\,
Physical Review D | 1995
Ikaros I.Y. Bigi; M. Shifman; Nikolai Uraltsev; A.I. Vainshtein
,
Nuclear Physics | 1987
Ikaros I.Y. Bigi; A.I. Sanda
n \ge 2
Physics Letters B | 1994
Ikaros I.Y. Bigi; B Block; Mikhail A. Shifman; A.I. Vainshtein
with