Results 71 to 80 of about 25,070 (157)

Differential Distributions in Semileptonic Decays of the Heavy Flavors in QCD

, 1993
Several references added, typos corrected.Comment: 22 pages, 4 figures (postscript file is available from the authors), plain LaTeX, NSF-ITP-93-68, TPI-MINN-93/33-T, UMN-TH-1208 ...
Blok, B., Koyrakh, L., Shifman, M., Vainshtein, A. I.   +3 more
core   +1 more source

Semileptonic B and Lambda_b Decays and Local Duality in QCD

, 1995
The inclusive and exclusive semileptonic decay distributions for b -> c decay are computed in the Shifman-Voloshin limit. The inclusive decay distributions (computed using an operator product expansion) depend on quark masses, and the exclusive decay ...
A. Falk, A.F. Falk, A.F. Falk, A.F. Falk, A.V. Manohar, Aneesh V. Manohar, B. Barish, B. Bigi, B. Bigis, B. Blok, Benjamin Grinstein, C. Glenn Boyd, C.G. Boyd, D. Buskulic, E. Eichten, E.C. Poggio, H. Georgi, J. Chay, J.D. Bjorken, J.D. Bjorken, M. Neubert, M.B. Voloshin, M.E. Luke, N. Isgur, N. Isgur, N. Isgur, T. Mannel, T.-M. Yan, Y. Nir   +28 more
core   +1 more source

Radiative transitions in charmonium from lattice QCD

Journal of High Energy Physics
The coupling of various charmonium mesons to a photon is studied using lattice QCD, giving access to radiative form factors and transitions, and probing the mesons’ structure.
James Delaney, Christopher E. Thomas, Sinéad M. Ryan, for the Hadron Spectrum collaboration   +3 more
doaj   +1 more source

Short-flow-time expansion of quark bilinears through next-to-next-to-leading order QCD

Journal of High Energy Physics
The gradient-flow formalism proves to be a useful tool in lattice calculations of quantum chromodynamics. For example, it can be used as a scheme to renormalize composite operators by inverting the short-flow-time expansion of the corresponding flowed ...
Janosch Borgulat, Robert V. Harlander, Jonas T. Kohnen, Fabian Lange   +3 more
doaj   +1 more source

Energy momentum tensor on and off the light cone: exposition with scalar Yukawa theory

Journal of High Energy Physics
We compute the gravitational form factors A i , D i and c ¯ i $$ {\overline{c}}_i $$ of the scalar Yukawa theory using both the light-cone and covariant perturbation theory at the one-loop level.
Xianghui Cao, Siqi Xu, Yang Li, Guangyao Chen, Xingbo Zhao, V. A. Karmanov, J. P. Vary   +6 more
doaj   +1 more source

Tensor mesons produced in tau lepton decays

, 2011
Light tensor mesons (T = a_2, f_2 and K_2^*) can be produced in decays of tau leptons. In this paper we compute the branching ratios of tau --> T pi nu decays by assuming the dominance of intermediate virtual states to model the form factors involved in ...
A. Lusiani, C. S. Kim, G. López Castro, H. Hatanaka, J. H. Muñoz   +4 more
core   +1 more source

Instantons, diquarks and non-leptonic weak decays of hyperons

, 2004
This work is devoted to the study of the non-perturbative contributions in non-leptonic hyperon decays. We show that the instanton-induced 't Hooft interaction can naturally explain the Delta I=1/2 rule, by generating quark-diquark clustering inside ...
Cristoforetti, M., Faccioli, P., Shuryak, E. V., Traini, M.   +3 more
core   +1 more source

Nonperturbative dynamics in D-meson mixing

Journal of High Energy Physics
Theoretical predictions for the $${D}^{0}\overline{{D }^{0}}$$ mixing parameters fall significantly short of experimental measurements, with discrepancies spanning several orders of magnitude. This gap is mainly due to the Glashow-Iliopoulos-Maiani (GIM)
Lovro Dulibić, Blaženka Melić, Alexey A. Petrov   +2 more
doaj   +1 more source

Branching ratios and direct CP asymmetries in $D\to PP$ decays

, 2012
We propose a theoretical framework for analyzing two-body nonleptonic $D$ meson decays, based on the factorization of short-distance (long-distance) dynamics into Wilson coefficients (hadronic matrix elements of four-fermion operators).
Cai-Dian Lu, Fu-Sheng Yu, Hsiang-nan Li, M. Charles   +3 more
core   +3 more sources

QEDr: a finite-volume QED action with redistributed spatial zero-momentum modes

Journal of High Energy Physics
We present a finite-volume QED action designed to improve the infinite-volume extrapolation of hadronic observables in precision lattice QCD+QED calculations.
Matteo Di Carlo, Maxwell T. Hansen, Nils Hermansson-Truedsson, Antonin Portelli   +3 more
doaj   +1 more source