Download or read book Use and Misuse of QCD Sum Rules in Heavy to Light Transitions written by and published by . This book was released on 1997 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The existing calculations of the form factors describing the decay B2!e? from QCD sum rules have yielded conflicting results at small values of the invariant mass squared of the lepton pair. We demonstrate that the disagreement originates from the failure of the short-distance expansion to describe the? meson distribution amplitude in the region where almost the whole momentum is carried by one of the constituents. This limits the applicability of QCD sum rules based on the short-distance expansion of a three-point correlation function to heavy-to-light transitions and calls for an expansion around the light cone, as realized in the light-cone sum rule approach. We derive and update light-cone sum rules for all the semileptonic form factors, using recent results on the? meson distribution amplitudes. The results are presented in detail together with a careful analysis of the uncertainties, including estimates of higher-twist effects, and compared to lattice calculations and recent CLEO measurements. We also derive a set of?improved? three-point sum rules, in which some of the problems of the short-distance expansion are avoided and whose results agree to good accuracy with those from light-cone sum rules.

Download or read book Use and Misuse of QCD Sum Rules Factorization and Related Topics written by and published by . This book was released on 1983 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of Branching Ratio and Polarization Fraction in Neutral B Meson Decays to Negative Rho Meson Positive Kaon Resonance written by Baosen Cheng and published by . This book was released on 2005 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics Briefs written by and published by . This book was released on 1984-07 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Energy Physics Index written by and published by . This book was released on 1984 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Qcd Spectral Sum Rules written by Stephan Narison and published by World Scientific. This book was released on 1990-01-01 with total page 545 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the book is to give an introduction to the method of QCD Spectral Sum Rules and to review its developments. After some general introductory remarks, Chiral Symmetry, the Historical Developments of the Sum Rules and the necessary materials for perturbative QCD including the MS regularization and renormalization schemes are discussed. The book also gives a critical review and some improvements of the wide uses of the QSSR in Hadron Physics and QSSR beyond the Standard Hadron Phenomenology. The author has participated actively in this field since 1978 just before the expanding success of the SVZ QSSR.

Download or read book INIS Atomindex written by and published by . This book was released on 1996 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Vacuum Structure and QCD Sum Rules written by Mikhail A. Shifman and published by North Holland. This book was released on 1992 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt: The method of the QCD sum rules was and still is one of the most productive tools in a wide range of problems associated with the hadronic phenomenology. Many heuristic ideas, computational devices, specific formulae which are useful to theorists working not only in hadronic physics, have been accumulated in this method. Some of the results and approaches which have originally been developed in connection with the QCD sum rules can be and are successfully applied in related fields, such as supersymmetric gauge theories, nontraditional schemes of quarks and leptons etc. The amount of literature on these and other more basic problems in hadronic physics has grown enormously in recent years. This volume presents a collection of papers which provide an overview of all basic elements of the sum rule approach and priority has been given to those works which seemed most useful from a pedagogical point of view.

Download or read book QCD Sum Rules for Processes with Heavy Quark and Photons written by Khodjamirian, A. Yu and published by . This book was released on 1996 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rules for Light Mesons written by Stephan Narison and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rules for the Light Quarks Vacuum Condensate written by Stephan Narison and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rules and Heavy Vector Mesons written by Nita Sinha and published by . This book was released on 1986 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rules for Heavy Quark Systems written by L. J. Reinders and published by . This book was released on 1980 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rules written by Hector Rubinstein and published by . This book was released on 1985 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rule Calculation of gamma gamma sup 2 pi Transition Form Factor written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book QCD Sum Rule Calculation of the Isgur wise Nonlogical Condensates written by and published by . This book was released on 1991 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the QCD sum rule approach, we develop a formalism that enables one to calculate the form factors of the heavy-light mesons in the m{sub Q} --> (infinity) limit. It is shown that the behavior of the universal Isgur-Wise form factor is determined by the quark propagation function in imaginary time.

Download or read book QCD Sum Rule Studies of Heavy Quarkonium like States written by Robin Kleiv and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: