Zobrazeno 1 - 10
of 704
pro vyhledávání: '"Becirevic A"'
We explain the difference between the measured decay widths of $b \to c \tau \nu$ processes and of $B\to K\nu\bar{\nu}$ and their values predicted in the Standard Model by introducing the right-handed interactions both to quarks and to leptons. At lo
Externí odkaz:
http://arxiv.org/abs/2410.23257
We discuss the exclusive lepton flavor violating (LFV) decays modes based on $b\to d\ell_i\ell_j$ and $b\to s\ell_i\ell_j$ by considering the ground state mesons and baryons. After spelling out the expressions for such decay rates in a low energy eff
Externí odkaz:
http://arxiv.org/abs/2407.19060
A quantum field has been coupled to a space-time with accelerating expansion. Dynamical modes are destabilised successively at shorter material wavelengths as they metamorphose from oscillators to repellers. Due to degeneracy of energy levels, the nu
Externí odkaz:
http://arxiv.org/abs/2404.17075
Publikováno v:
Phys.Rev.D 110 (2024) 5, 055023
Motivated by the long-standing discrepancy in lepton flavor universality ratios $R_D$ and $R_{D^{\ast}}$ we assess the status of scalar leptoquark states $R_2$, $\widetilde R_2$ and $S_1$ which can in principle provide a desired enhancement of $\math
Externí odkaz:
http://arxiv.org/abs/2404.16772
The normalization of the leading-twist photon distribution amplitude (DA), $f_{\gamma}^{\perp}$, is an important ingredient in the study of exclusive processes involving the photon emission by means of QCD sum-rules. In this paper we determine the up
Externí odkaz:
http://arxiv.org/abs/2404.10644
Autor:
Allwicher, Lukas, Becirevic, Damir, Piazza, Gioacchino, Rosauro-Alcaraz, Salvador, Sumensari, Olcyr
Recently, Belle II reported on the first measurement of $\mathcal{B}(B^\pm\to K^\pm \nu\bar{\nu})$ which appears to be almost $3\sigma$ larger than predicted in the Standard Model. We point out the important correlation with $\mathcal{B}(B\to K^{\ast
Externí odkaz:
http://arxiv.org/abs/2309.02246
Publikováno v:
Eur.Phys.J.C 83 (2023) 3, 252
In this letter we revisit the Standard Model predictions for $\mathcal{B}(B\to K^{(\ast)}\nu\bar{\nu})$ and discuss the opportunities that open up when combining its partial decay rate with that of $B\to K^{(\ast)}\ell\ell$. In the Standard Model a s
Externí odkaz:
http://arxiv.org/abs/2301.06990
Autor:
Becirevic, Damir, Jaffredo, Florentin
Motivated by the first observation of $\Lambda_b\to\Lambda_c~\tau\bar{\nu}$ by LHCb, we discuss various observables that can be derived from angular distribution of this decay which, if measured, could be essential for explanation of the $b\to c\tau\
Externí odkaz:
http://arxiv.org/abs/2210.12071
Autor:
Bečirević, Damir, Jaffredo, Florentin
One of the most pragmatic ways to look for the effects of New Physics at low energy scales is to study a detailed angular distribution of various decay modes, and in particular those based on $b\to c\ell\bar \nu_\ell$. In this paper we focus onto $\L
Externí odkaz:
http://arxiv.org/abs/2209.13409
Autor:
Bečirević, Damir, Doršner, Ilja, Fajfer, Svjetlana, Faroughy, Darius A., Jaffredo, Florentin, Košnik, Nejc, Sumensari, Olcyr
We discuss a model that can accommodate the $B$-physics anomalies, based on combining two scalar leptoquarks, $R_2$ and $S_3$, of mass $\mathcal{O}(1\,\mathrm{TeV})$, and that we proposed in our previous paper. We update the analysis of its parameter
Externí odkaz:
http://arxiv.org/abs/2206.09717