Results 21 to 30 of about 2,235,212 (197)

Alternative treatment of the quark mass in the heavy quark expansion

Journal of High Energy Physics, 2023
The treatment of the quark mass plays an important role when it comes to increasing the precision of the predictions of the heavy quark expansion for inclusive heavy hadron decays.
Anastasia Boushmelev, Thomas Mannel, K. Keri Vos   +2 more
doaj   +1 more source

First extraction of inclusive V cb from q 2 moments

Journal of High Energy Physics, 2022
We present the first determination of V cb from inclusive B → X c ℓ v ¯ ℓ $$ B\to {X}_c \ell {\overline{v}}_{\ell} $$ using moments of the dilepton invariant mass, q 2.
Florian Bernlochner, Matteo Fael, Kevin Olschewsky, Eric Persson, Raynette van Tonder, K. Keri Vos, Maximilian Welsch   +6 more
doaj   +1 more source

Study of the b → dℓℓ transitions in the Standard Model and test of New Physics sensitivities

Journal of High Energy Physics, 2023
After incorporating all the available experimental data and the most up-to-date Lattice and light cone sum rule (LCSR) inputs on the form factors, we analyze the exclusive b → uℓν ℓ and b → dℓℓ decays simultaneously.
Aritra Biswas, Soumitra Nandi, Sunando Kumar Patra, Ipsita Ray   +3 more
doaj   +1 more source

Muon mass correction in partial wave analyses of charmed meson semi-leptonic decays [PDF]

, 2023
We derive the parameterization formula for partial wave analyses of charmed meson semi-leptonic decays with consideration of the effects caused by the lepton mass.
Ke, Bai-Cian, Wang, En, Zhang, Han, Yu, Yao, En Wang, Bai-Cian Ke, Yao Yu, Han Zhang   +7 more
core   +1 more source

Quark-hadron duality at work: lifetimes of bottom baryons

Journal of High Energy Physics, 2023
In the 1990s, very low experimental values for the lifetime ratio τ(Λ b )/τ(B d ) triggered a considerable amount of doubt in the applicability of the heavy quark expansion (HQE), which is based on the assumption of quark-hadron duality (QHD) for ...
James Gratrex, Alexander Lenz, Blaženka Melić, Ivan Nišandžić, Maria Laura Piscopo, Aleksey V. Rusov   +5 more
doaj   +1 more source

Revisiting inclusive decay widths of charmed mesons

Journal of High Energy Physics, 2022
Determining for the first time the Darwin operator contribution for the non-leptonic charm-quark decays and using new non-perturbative results for the matrix elements of ∆C = 0 four-quark operators, including eye-contractions, we present a comprehensive ...
Daniel King, Alexander Lenz, Maria Laura Piscopo, Thomas Rauh, Aleksey V. Rusov, Christos Vlahos   +5 more
doaj   +1 more source

SEMI-LEPTONIC B DECAY [PDF]

B Physics and CP Violation, 1998
Latex2.09, uses sprocl.sty and epsf.sty. 10 pages with 3 postscript files included.
openaire   +2 more sources

Semi-leptonic decays of B-mesons [PDF]

Nuclear Physics B - Proceedings Supplements, 1995
3 pages, uuencoded compressed postscript file; contribution to Lattice '94, 27 Sep - 1 Oct, Bielefeld, Germany; to appear in the ...
openaire   +2 more sources

B → D1(2420) and B → D 1 ′ $$ {\mathrm{D}}_1^{\prime } $$ (2430) form factors from QCD light-cone sum rules

Journal of High Energy Physics, 2022
We perform the first calculation of form factors in the semileptonic decays B → D 1(2420)ℓν ℓ and B → D 1 ′ $$ {D}_1^{\prime } $$ (2430)ℓν ℓ using QCD light-cone sum rules (LCSRs) with B-meson distribution amplitudes. In this calculation the c-quark mass
Nico Gubernari, Alexander Khodjamirian, Rusa Mandal, Thomas Mannel   +3 more
doaj   +1 more source

Leptonic and semi-leptonic B decays [PDF]

Nuclear Physics B - Proceedings Supplements, 2001
We present results for the semi-leptonic and leptonic decays of B mesons. These non-perturbative matrix elements are important for constraining the CKM matrix. Results are presented for the pseudoscalar and vector decay constants, as well as flavour breaking ratios and heavy quark symmetry relations.
UKQCD Collaboration, Maynard, C. M.
openaire   +2 more sources