Results 61 to 70 of about 25,070 (157)

Selected Topics on Rare Kaon Processes - in the Standard Model and Supergravity -

, 1993
Rare kaon processes appear to be particularly suitable to study the extensions of the standard model, especially if the possibility for eventual direct evidence becomes unlikely. In this review, we discuss processes that are important as a test of either
Aihara, Alvarez-Gaumé, Amaldi, Barbieri, Barbieri, Barbieri, Bardeen, Bardeen, Bartel, Battiston, Bernard, Bernard, Bernard, Bernard, Bertolini, Bijnens, Bijnens, Bilić, Bouquet, Bradamante, Buchala, Buchmüller, Bunens, Buras, Buras, Buras, Chau, Chivikula, Costa, Craddock, Cremmer, D'Ambrosio, De Rafael, Dib, Donoghue, Donoghue, Dugan, Duncan, Ecker, Ecker, Ellis, Ellis, Ellis, Ellis, Ellis, Ellis, Espriu, Fayet, Fayet, Ferrara, Franco, Gaillard, Gaillard, Gaillard, Gasser, Gavela, Gilman, Goity, Goity, Guberina, Guberina, Guberina, Guberina, Gérard, Gérard, Haber, Hagelin, Ibánez, Inami, Kambor, Kambor, Kane, Kilcup, Kleinknecht, Kotthaus, Lahanas, Langacker, Langacker, Ma, Maiani, Martin, Martinelli, Nanopoulos, Nilles, Nilles, Novikov, Novikov, Peccei, Peccei, Peccei, Peccei, Peccei, Petronzio, Pich, Pich, Pich, Pich, Pich, Pich, Polchinski, Prades, Romão, Ross, Salam, Schrock, Schröder, Seghal, Shabalin, Sharpe, Sharpe, Shifman, Sirlin, Soni, Suzuki, Tadić, Vainshtein, Vainshtein, Vainshtein, Van Nieuwenhuizen, Voloshin, Walcher, Weinberg, Weinstein, Wise, Witten   +124 more
core   +1 more source

Probing the inverse moment of B s -meson distribution amplitude via B s → η s form factors

Journal of High Energy Physics
We investigate the inverse moment of the B s -meson light-cone distribution amplitude (LCDA), denoted as λ B s $$ {\lambda}_{B_s} $$ and defined within the heavy quark effective theory, through the calculation of B s → η s form factors.
Rusa Mandal, Praveen S Patil, Ipsita Ray
doaj   +1 more source

Hadronic structure aspects of $K^+\to \pi^-+ l^{+}_1 + l^{+}_2$ decays

, 2004
As is known from previous studies the lepton number violating decays $K^+\to \pi^- + l^{+}_1 + l^{+}_2$ have good prospects to probe new physics beyond the Standard Model and provide valuable information on neutrino masses and mixing.
A. Faessler, C. Dib, M. Gell-Mann, Mikhail A. Ivanov, P. Minkowski, S. Glashow, Sergey G. Kovalenko, V. Gribanov   +7 more
core   +1 more source

Form factors and phenomenology of B (s) and D (s) semileptonic decays to η and η ′

Journal of High Energy Physics
Motivated by more precise recent measurements of the B → ηℓν and D (s) → η (′) ℓν decays, we employ state-of-the-art parametrizations to describe the B (s), D (s) → η (′) form factors across the full q 2 range, fitting them to the latest light-cone sum ...
Blaženka Melić, Méril Reboud
doaj   +1 more source

Revisiting $$\Lambda _{b}\rightarrow \Lambda _{c}$$ Λb→Λc and $$\Sigma _{b}\rightarrow \Sigma _{c}$$ Σb→Σc weak decays in the light-front quark model

European Physical Journal C: Particles and Fields, 2019
In this work, we study $$\Lambda _{b}\rightarrow \Lambda _{c}$$ Λb→Λc and $$\Sigma _{b}\rightarrow \Sigma _{c}$$ Σb→Σc weak decays in the light-front quark model.
Hong-Wei Ke, Ning Hao, Xue-Qian Li
doaj   +1 more source

Nonuniversal $Z^{\prime}$ couplings in B decays

, 2006
We study the impacts of nonuniversal $Z^{\prime}$ model, providing flavor changing neutral current at tree level, on the branching ratios (BRs), CP asymmetries (CPAs) and polarization fractions of B decays.
Chen, Chuan-Hung, Hatanaka, Hisaki
core   +1 more source

Hybrid analysis of radiative corrections to neutron decay with current algebra and effective field theory

Journal of High Energy Physics
We introduce a useful framework for high-precision studies of the neutron beta decay by merging the current algebra description and the fixed-order effective field theory calculation of the electroweak radiative corrections to the neutron axial form ...
Chien-Yeah Seng
doaj   +1 more source

D and Ds decay constants in N f = 2 + 1 QCD with Wilson fermions

Journal of High Energy Physics
We present results for the leptonic decay constants of the D and Ds mesons from N f = 2 + 1 lattice QCD. We employ a set of 49 high statistics gauge ensembles generated by the Coordinated Lattice Simulations (CLS) effort utilising non-perturbatively ...
The RQCD collaboration and the ALPHA collaboration, Simon Kuberski, Fabian Joswig, Sara Collins, Jochen Heitger, Wolfgang Söldner   +5 more
doaj   +1 more source

Applications of QCD Sum Rules to Heavy Quark Physics

, 2013
In these lectures, I present several important applications of QCD sum rules to the decay processes involving heavy-flavour hadrons. The first lecture is introductory.
Khodjamirian, Alexander
core   +1 more source

HQET sum rules for matrix elements of dimension-six four-quark operators for meson lifetimes within and beyond the Standard Model

Journal of High Energy Physics
Theory predictions of heavy-hadron lifetime ratios critically depend on precise determinations of the dimension-six spectator effects arising from the double insertion of the weak effective |∆B| = 1 Hamiltonian.
Matthew Black, Martin Lang, Alexander Lenz, Zachary Wüthrich   +3 more
doaj   +1 more source