Results 121 to 130 of about 219,826 (264)

Do we understand the unquenched value of fB? [PDF]

, 2000
I review our qualitative understanding of the increase in the value of the B meson decay constant (fB), when dynamical fermions are included in lattice QCD calculations.Comment: 4 pages.
Aoki S (CP-PACS), Bali G S, Bernard C, Bernard C, Bernard C, Bernard C W, Booth M J, Bowler K C (UKQCD), Butler F, Collins S, CP-PACS, Craig McNeile, Draper T, Eicker N (SESAM), El-Khadra A X, Groom D E, Gupta R, Horsley R (UKQCD), Ishikawa K-I (JLQCD), Nir Y, Sharpe S R, Sharpe S R, Sharpe S R   +22 more
core   +4 more sources

Impact of background effects on the inclusive V cb determination

Journal of High Energy Physics, 2021
The determination of the CKM element V cb from inclusive semileptonic b → cℓ ν ¯ $$ \overline{\nu} $$ decays has reached a high precision thanks to a combination of theoretical and experimental efforts.
Thomas Mannel, Muslem Rahimi, K. Keri Vos   +2 more
doaj   +1 more source

Large Nc physics from the lattice [PDF]

, 2002
I summarise what lattice methods can contribute to our understanding of the phenomenology of QCD at large Nc and describe some recent work on the physics of SU(Nc) gauge theories. These non-perturbative calculations show that there is indeed a smooth Nc -
Teper, M.
core   +3 more sources

Probing axial quark generalized parton distributions through exclusive photoproduction of a γπ ± pair with a large invariant mass

Journal of High Energy Physics, 2018
Exclusive photoproduction of a γπ ± pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum is described in the collinear factorization framework.
G. Duplančić, K. Passek-Kumerički, B. Pire, L. Szymanowski, S. Wallon   +4 more
doaj   +1 more source

Hadroproduction of scalar P -wave quarkonia in the light-front k T -factorization approach

Journal of High Energy Physics, 2020
In this work, we present a thorough analysis of scalar P -wave χ Q0, Q = c, b quarkonia electromagnetic form factors for the γ ∗ γ ∗ → χ Q0 couplings, as well as their hadroproduction observables in k ⊥-factorisation using the light-front (LF) potential ...
Izabela Babiarz, Roman Pasechnik, Wolfgang Schäfer, Antoni Szczurek   +3 more
doaj   +1 more source

Status of Lattice Flavor Physics [PDF]

, 2004
This talk reviews recent lattice QCD calculations relevant for quark flavor physics. Since lattice results must be accurate and precise to play a definitive role in phenomenology, the focus is on unquenched results of quantities which can be calculated ...
Abada, Abada, Ali Khan, Ali Khan, Ali Khan, Aoki, Aoki, Arndt, Athar, Aubin, Aubin, Aubin, Aubin, Bernard, Bernard, Bećirević, Bećirević, Bećirević, Bećirević, Davies, DeGrand, Dimopoulos, Eidelman, El-Khadra, El-Khadra, Flynn, Foley, Gamiz, Gray, Gupta, Hashimoto, Ishizuka, Kronfeld, Lee, Marciano, Matthew Wingate, Okamoto, Sharpe, Shigemitsu, Sommer, Wingate, Wingate, Yamada   +42 more
core   +3 more sources

Nonperturbative QCD phenomenology and light quark physics [PDF]

Nuclear Physics B - Proceedings Supplements, 2005
6 pages, 7 figures.
openaire   +2 more sources

Impact of isolation and fiducial cuts on q T and N-jettiness subtractions

Journal of High Energy Physics, 2020
Kinematic selection cuts and isolation requirements are a necessity in experimental measurements for identifying prompt leptons and photons that originate from the hard-interaction process of interest.
Markus A. Ebert, Frank J. Tackmann
doaj   +1 more source

NNLO QCD corrections to leptonic observables in top-quark pair production and decay

Journal of High Energy Physics, 2021
We calculate a comprehensive set of spin correlations and differential distributions in top-quark pair production and decay to dilepton final states. Our calculation is performed in the Narrow Width Approximation.
Michał Czakon, Alexander Mitov, Rene Poncelet   +2 more
doaj   +1 more source

Isolated photon and photon+jet production at NNLO QCD accuracy

Journal of High Energy Physics, 2020
We describe the calculation of the next-to-next-to-leading order (NNLO) QCD corrections to isolated photon and photon-plus-jet production, and discuss how the experimental hadron-level photon definition and isolation criteria can be approximated in the ...
Xuan Chen, Thomas Gehrmann, Nigel Glover, Marius Höfer, Alexander Huss   +4 more
doaj   +1 more source