Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Mandal, Rusa"'
We investigate the inverse moment of the $B_s$-meson light-cone distribution amplitude (LCDA), denoted as $\lambda_{B_s}$ and defined within the heavy quark effective theory, through the calculation of $B_s \to \eta_s$ form factors. The presence of t
Externí odkaz:
http://arxiv.org/abs/2402.16737
Publikováno v:
JHEP 12 (2023) 015
We present the first application of QCD light-cone sum rules (LCSRs) with $B_{(s)}$-meson distribution amplitudes to the $B_{(s)}\!\to\! D_{(s)0}^*$ form factors, where $D_{(s)0}^*$ is a charmed scalar meson. We consider two scenarios for the $D_0^*$
Externí odkaz:
http://arxiv.org/abs/2309.10165
We constrain the inverse moment of the $B$-meson light-cone distribution amplitude (LCDA), $\lambda_B$ in heavy quark effective theory, using form factor estimates from Lattice QCD collaboration. The estimation of the parameter $\lambda_B$ has, until
Externí odkaz:
http://arxiv.org/abs/2308.07033
Autor:
Mandal, Rusa, Tong, Tom
Publikováno v:
JCAP11(2023)074
Motivated by the dynamical reasons for the hierarchical structure of the Yukawa sector of the Standard Model (SM), we consider an extension of the SM with a complex scalar field, known as `flavon', based on the Froggatt-Nielsen mechanism. In an effec
Externí odkaz:
http://arxiv.org/abs/2307.14972
Publikováno v:
JHEP 05 (2022) 029
We perform the first calculation of form factors in the semileptonic decays $B\!\to\! D_1(2420)\ell\nu_\ell$ and $B \to D_1^\prime (2430)\ell \nu_\ell$ using QCD light-cone sum rules (LCSRs) with $B$-meson distribution amplitudes. In this calculation
Externí odkaz:
http://arxiv.org/abs/2203.08493
Publikováno v:
EPJC 82, 916(2022)
While the hunt for new states beyond the standard model (SM) goes on for various well motivated theories, the leptoquarks are among the most appealing scenarios at recent times due to a series of tensions observed in $B$-meson decays. We consider $SU
Externí odkaz:
http://arxiv.org/abs/2108.06506
Publikováno v:
Phys. Rev. D 104, 053007 (2021)
Semileptonic flavor changing neutral current transitions with a pair of neutrinos in the final state are very accurately determined in the standard model (SM) and thus provide an accurate and sensitive probe for physics beyond the SM. Until recently,
Externí odkaz:
http://arxiv.org/abs/2107.01080
We investigate the viability of extending the Standard Model with $S_1$ and $S_3$ scalar leptoquarks when the flavour structure is parametrized in terms of Froggatt-Nielsen charges. In contrast to a similar analysis with a vector leptoquark, we find
Externí odkaz:
http://arxiv.org/abs/2010.03297
Publikováno v:
JHEP 10 (2020) 043
We derive a QCD sum rule for the inverse moment of the $B_s$-meson light-cone distribution amplitude in HQET. Within this method, the $SU(3)_{fl}$ symmetry violation is traced to the strange quark mass and to the difference between strange and nonstr
Externí odkaz:
http://arxiv.org/abs/2008.03935
Publikováno v:
JCAP 08 (2020) 019
We explore the neutrino portal dark matter (DM) at its minimum of field content having two dark sector particles coupled to a right-handed neutrino. Assuming the feeble nature of their interactions with the standard model (SM) particles, we analyze t
Externí odkaz:
http://arxiv.org/abs/2005.13933