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pro vyhledávání: '"L. Bar"'
In the determination of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ from inclusive semileptonic $B$-meson decays, moments of the leptonic invariant mass spectrum constitute valuable observables. To evaluate them with sufficient precision,
Externí odkaz:
http://arxiv.org/abs/2411.12866
Autor:
Chen, Chen
This report introduces two recent measurements of semileptonic $b$-hadron decays at the LHCb experiment, including a test of Lepton Flavour Universality (LFU) using $\bar{B}^0 \to D^{(*)+} l^- \bar{\nu}_l$ decays where $l\in\{\mu,\tau\}$, and a study
Externí odkaz:
http://arxiv.org/abs/2405.08953
Publikováno v:
Prog Theor Exp Phys (2023)
A systematic study of one-loop contributions to the decay channels $h\rightarrow l\bar{l}\gamma$ with $l=\nu_{e,\mu, \tau}, e, \mu$, performed in Higgs extended versions of the Standard Model, is presented in the 't Hooft-Veltman gauge. Analytic form
Externí odkaz:
http://arxiv.org/abs/2305.04002
Publikováno v:
Phys. Rev. D 104, 034032 (2021)
We revisit the experimental and theoretical status of $B \to \rho l \bar{\nu}$ and $B \to \omega l \bar{\nu}$ decays. We perform a combined fit of averaged spectra from Belle and Babar measurements with prior light cone sum rule calculations, in orde
Externí odkaz:
http://arxiv.org/abs/2104.05739
Autor:
Bashirova, A. N., Nursultanov, E. D.
In terms of the Fourier-Haar coefficients, a criterion is obtained for the function $f (x_1,x_2)$ to belong to the net space $N_{\bar{p},\bar{q}}(M)$ and to the Lebesgue space $L_{\bar{p}}[0,1]^2$ with mixed metric, where $1<\bar{p}<\infty$, $0<\bar{
Externí odkaz:
http://arxiv.org/abs/2009.01105
In this paper, we studied the semileptonic decays $B_c^- \to (\eta_c, J/\psi) l ^- \bar{\nu}_l$ by employing the PQCD factorization approach, using the newly defined distribution amplitudes of the $B_c$ meson and the new kind of parametrization for e
Externí odkaz:
http://arxiv.org/abs/1904.07530
Autor:
Marangotto, Daniele
Publikováno v:
Advances in High Energy Physics (2019) 5274609
The $\bar{B}\to D^{*+} l^-\bar{\nu}_{l}$ branching fraction ratio $R(D^{*})$ has shown intriguing discrepancies between the Standard Model prediction and measurements performed at BaBar, Belle and LHCb experiments, a possible sign of beyond the Stand
Externí odkaz:
http://arxiv.org/abs/1812.08144
Publikováno v:
Prog Theor Exp Phys (2019)
We have investigated $B \to (K,K^*)(l\bar l,\nu\bar\nu)$ decay channels and predicted some form factor dependent observables (e.g. branching ratio, forward-backward asymmetry and lepton polarization asymmetry) considering new physics contribution fro
Externí odkaz:
http://arxiv.org/abs/1811.03869
Publikováno v:
Phys. Rev. D 96, 115017 (2017)
Motivated by the recent observation of lepton universality violation in the flavour changing charged current transitions $b \to c l \bar{\nu}_l$, we intend to scrutinize the lepton non-universality effects in rare semileptonic $B$ meson decays involv
Externí odkaz:
http://arxiv.org/abs/1711.10924
In our previous work, based on the $SU(6)$ spin-flavor wave function, we regard $\Lambda$ and $p$ as composed of different quark-diquark configurations and established the Bethe-Salpeter (BS) equations of configurations for quark and scalar diquark.
Externí odkaz:
http://arxiv.org/abs/1503.06907