Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Brunet, Martin"'
The recent Belle II observation of $B \to K E_{\rm miss}$ challenges theoretical interpretations in terms of Standard Model neutrino final states. Instead, we consider new physics scenarios where up to two new light-invisible particles of spin 0 up t
Externí odkaz:
http://arxiv.org/abs/2403.13887
We consider the combined measurements of CP-averaged decay rates and direct CP asymmetries of $B^\pm\to K^\pm \ell^+ \ell^-$ and $B^\pm\to \pi^\pm \ell^+ \ell^-$ to probe (non-local) four-quark operator matrix element contributions to rare semilepton
Externí odkaz:
http://arxiv.org/abs/2403.13056
Autor:
Algueró, Marcel, Biswas, Aritra, Capdevila, Bernat, Descotes-Genon, Sébastien, Matias, Joaquim, Novoa-Brunet, Martín
We discuss the impact of the recent LHCb update on the two lepton-flavour universality ratios $R_K$ and $R_{K^*}$, and the CMS update of $B({B_s \to \mu^+\mu^-})$ regarding the possibility of New Physics in $b\to s\ell^+\ell^-$ decays. We perform glo
Externí odkaz:
http://arxiv.org/abs/2304.07330
Autor:
Novoa-Brunet, Martín
We discuss the consequences of deviations from the Standard Model observed in $b\to s\mu^+\mu^-$ transitions for flavour-changing neutral-current processes involving down-type quarks and neutrinos. We work within an effective field theory approach re
Externí odkaz:
http://arxiv.org/abs/2211.04383
We consider the time-dependent analysis of rare $B_d$ and $B_s$ decays mediated by $b\to s \nu \bar \nu$ transitions. The inclusion of time evolution allows us to construct novel observables with specific sensitivity to CP-odd phases in these process
Externí odkaz:
http://arxiv.org/abs/2208.10880
We investigate the consequences of deviations from the Standard Model observed in $b\to s\mu\mu$ transitions for flavour-changing neutral-current processes involving down-type quarks and neutrinos, under generic assumptions concerning the structure o
Externí odkaz:
http://arxiv.org/abs/2105.09693
Autor:
Algueró, Marcel, Capdevila, Bernat, Descotes-Genon, Sébastien, Matias, Joaquim, Novoa-Brunet, Martín
We present an up-to-date complete model-independent global fit to $b\to s\ell^+\ell^-$ observables that confirms patterns of New Physics able to explain the data. We include the recent LHCb measurements of $R_K$, $R_{K_S}$, $R_{K^{*+}}$, $B_s \to \ph
Externí odkaz:
http://arxiv.org/abs/2104.08921
Publikováno v:
Phys. Rev. D 103, 113009 (2021)
We propose a novel method to probe the persistent hints of Lepton Flavour Universality violation observed in semileptonic $B$ decays. Relying on the specific properties of the Belle II experiment, it consists in comparing the inclusive rates of $\Ups
Externí odkaz:
http://arxiv.org/abs/2104.06842
Autor:
Algueró, Marcel, Crivellin, Andreas, Descotes-Genon, Sébastien, Matias, Joaquim, Novoa-Brunet, Martín
In the context of the recently measured non-leptonic decays $B_{d}\to K^{*0}\bar{K}^{*0}$ and $B_{s}\to K^{*0}\bar{K}^{*0}$ we analyse the anatomy of the $L_{VV}$ observable that compares the longitudinal components of $B_s \to VV$ and $B_d \to VV$ d
Externí odkaz:
http://arxiv.org/abs/2011.07867
Publikováno v:
JHEP 02 (2021) 129
We consider the time-dependent analysis of $B_d\to K_S\ell\ell$ taking into account the time-evolution of the $B_d$ meson and its mixing into $\bar{B}_d$. We discuss the angular conventions required to define the angular observables in a transparent
Externí odkaz:
http://arxiv.org/abs/2008.08000