Results 41 to 50 of about 776 (208)

Inclusive B ¯ → X s ℓ + ℓ − $$ \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} $$ at the LHC: theory predictions and new-physics reach

Journal of High Energy Physics
We present theoretical predictions for observables in inclusive B ¯ → X s ℓ + ℓ − $$ \overline{B}\to {X}_s{\ell}^{+}{\ell}^{-} $$ suitable for measurements at hadron colliders through a sum-over-exclusive approach.
Tobias Huber, Tobias Hurth, Jack Jenkins, Enrico Lunghi, Qin Qin, K. Keri Vos   +5 more
doaj   +1 more source

Exclusive semi-leptonic decays of bottom baryons

Physics Letters B, 1990
Abstract We calculate the exclusive semi-leptonic bottom baryon decays Λ b →Λ c +l − + v l , Σ b → Σ c +l − + v l and Σ b →Σ c ∗ +l − + v l in the spectator quark model. The helicity structure of the baryonic current transitions Λb→Λc, Σ
F. Hussain, J.G. Körner, R. Migneron
openaire   +2 more sources

Semileptonic tau decays beyond the Standard Model

Journal of High Energy Physics, 2022
Hadronic τ decays are studied as probe of new physics. We determine the dependence of several inclusive and exclusive τ observables on the Wilson coefficients of the low-energy effective theory describing charged-current interactions between light quarks
Vincenzo Cirigliano, David Díaz-Calderón, Adam Falkowski, Martín González-Alonso, Antonio Rodríguez-Sánchez   +4 more
doaj   +1 more source

Investigating non-local contributions in B s → ϕ ℓ ¯ ℓ $$ {B}_s\to \phi \overline{\ell}\ell $$ including higher-twist effects

Journal of High Energy Physics
We analyze the impact of higher-twist three-particle B s -meson light-cone distribution amplitudes (LCDAs) on the non-local form factors for the B s → ϕ ℓ ¯ ℓ $$ {B}_s\to \phi \overline{\ell}\ell $$ transition focusing on the ‘charm-loop’ contribution ...
M. S. A. Alam Khan, Rusa Mandal, Praveen S Patil, Ipsita Ray   +3 more
doaj   +1 more source

Rare b decays meet high-mass Drell-Yan

Journal of High Energy Physics, 2023
Rare b hadron decays are considered excellent probes of new semileptonic four-fermion interactions of microscopic origin. However, the same interactions also correct the high-mass Drell-Yan tails.
Admir Greljo, Jakub Salko, Aleks Smolkovič, Peter Stangl   +3 more
doaj   +1 more source

High-pT LHC constraints on SMEFT operators affecting rare kaon and hyperon decays

Journal of High Energy Physics
We consider the constraints on new physics affecting rare kaon and hyperon decay as parametrized by a low energy effective theory that can be obtained from high-pT observables at LHC. To this end, we match the relevant low energy Wilson coefficients onto
Arnab Roy, German Valencia
doaj   +1 more source

Dispersive analysis of B → K (*) and B s → ϕ form factors

Journal of High Energy Physics, 2023
We propose a stronger formulation of the dispersive (or unitarity) bounds à la Boyd-Grinstein-Lebed (BGL), which are commonly applied in analyses of the hadronic form factors for B decays.
Nico Gubernari, Méril Reboud, Danny van Dyk, Javier Virto   +3 more
doaj   +1 more source

On the impact of meson mixing on B s → ϕee angular observables at low q 2

Journal of High Energy Physics, 2023
Decays based on the b → sγ transition are expected to yield left-handed photons in the Standard Model, but could be particularly sensitive to New Physics contributions modifying the short-distance Wilson coefficients C $$ \mathcal{C} $$ 7 and C ...
Sébastien Descotes-Genon, Ioannis Plakias, Olcyr Sumensari   +2 more
doaj   +1 more source

Semi-leptonic decays of charmed baryons [PDF]

Nuclear Physics B, 1976
Abstract We present estimates of semi-leptonic decays of the charmed 1+ 2 baryons, members of the SU(3) 3∗ and 6 multiplets, into ordinary 1+ 2 and 3+ 2 baryons. We give general expressions for decay rates and the mass M(B+l) spectra.
openaire   +1 more source

(Semi-) leptonic charmed meson decays at BESIII [PDF]

Proceedings of 10th International Workshop on Charm Physics — PoS(CHARM2020), 2021
BESIII has collected 2.93 fb$^{-1}$ and 6.32 fb$^{-1}$ of $e^+ e^-$ collision data samples at the center-of-mass energies 3.773 and 4.178-4.226 GeV, respectively. We report recent measurements of the (semi-) leptonic decays $D_{s} \to \ell^+ \nu_{\ell}~(\ell=\mu, \tau)$ and $D_{(s)} \to X \ell^+ \nu_{\ell}$ [$X=\eta, K_{1}(1270)$ or denotes generic ...
openaire   +1 more source