Results 31 to 40 of about 48,672 (174)
Quark Mass Models and Reinforcement Learning
Journal of High Energy Physics, 2021 In this paper, we apply reinforcement learning to the problem of constructing models in particle physics. As an example environment, we use the space of Froggatt-Nielsen type models for quark masses.
T. R. Harvey, A. Lukas
doaj +1 more source
A 3-3-1 model with low scale seesaw mechanisms
, 2019 We construct a viable 3-3-1 model with two $SU(3)_L$ scalar triplets, extended fermion and scalar spectrum, based on the $T^{\prime}$ family symmetry and other auxiliary cyclic symmetries, whose spontaneous breaking yields the observed pattern of SM ...
Hernández, A. E. Cárcamo +2 more
core +1 more source
Fermion Masses and Mixing in General Warped Extra Dimensional Models [PDF]
, 2015 We analyze fermion masses and mixing in a general warped extra dimensional model, where all the Standard Model (SM) fields, including the Higgs, are allowed to propagate in the bulk.
Frank, Mariana +3 more
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The flavor-changing top-charm associated productions at ILC in littlest Higgs model with T parity
, 2010 The littlest Higgs model with T-parity (LHT) has new flavor-changing (FC) couplings with the Standard Model (SM) quarks, which do not suffer strong constraints from electroweak precision data.
Lu, Gongru, Wang, Xuelei, Zhang, Yanju
core +1 more source
Model-independent prediction of R(η c )
Journal of High Energy Physics, 2018 We present a model-independent prediction for R(η c )≡ℬℛ(B c + → η c τ + ν τ )/ℬℛ(B c + → η c µ + ν µ ). This prediction is obtained from the form factors through a combination of dispersive relations, heavy-quark relations at zero-recoil, and the ...
Anson Berns, Henry Lamm
doaj +1 more source
Flavor Democracy in Standard Models at High Energies
, 1993 It is possible that the standard model (SM) is replaced around some transition energy $\E_{tr}$ by a new, possibly Higgsless, ``flavor gauge theory'' such that the Yukawa (running) parameters of SM at $E \sim \E_{tr}$ show up an (approximate) flavor ...
Abe +36 more
core +2 more sources
Fully-differential top-pair production at a lepton collider: from threshold to continuum
Journal of High Energy Physics, 2018 We present an approach to predict exclusive W + b W − b ¯ $$ {W}^{+}b{W}^{-}\overline{b} $$ production at lepton colliders that correctly describes the top-anti-top threshold as well as the continuum region.
Fabian Bach +7 more
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Has the origin of the third-family fermion masses been determined?
Journal of High Energy Physics, 2021 Precision measurements of the Higgs couplings are, for the first time, directly probing the mechanism of fermion mass generation. The purpose of this work is to determine to what extent these measurements can distinguish between the tree-level mechanism ...
Michael J. Baker +2 more
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Perturbative corrections to power suppressed effects in B ¯ $$ \overline{B} $$ → X u ℓν
Journal of High Energy Physics, 2021 We compute the O(α s ) corrections to the Wilson coefficients of the dimension five operators in inclusive semileptonic B decays in the limit of a massless final quark.
Bernat Capdevila +2 more
doaj +1 more source
Fortschritte der Physik, Volume 74, Issue 4, April 2026.Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley +1 more source