scholarly journals Quark masses and mixings in minimally parameterized UV completions of the Standard Model

2020 ◽  
Vol 421 ◽  
pp. 168282
Author(s):  
Reinhard Alkofer ◽  
Astrid Eichhorn ◽  
Aaron Held ◽  
Carlos M. Nieto ◽  
Roberto Percacci ◽  
...  
Keyword(s):  
Standard Model ◽  
Quark Masses ◽  
The Standard Model

scholarly journals D → Klv semileptonic decay using lattice QCD with HISQ at physical pion masses

2018 ◽  
Vol 175 ◽  
pp. 13027 ◽  
Author(s):  
Bipasha Chakraborty ◽  
Christine Davies ◽  
Jonna Koponen ◽  
G Peter Lepage
Keyword(s):  
Standard Model ◽  
Lattice Qcd ◽  
Semileptonic Decay ◽  
Light Quark ◽  
Form Factors ◽  
New Physics ◽  
Ckm Matrix ◽  
Quark Masses ◽  
The Standard Model ◽  
Fertile Ground

he quark flavor sector of the Standard Model is a fertile ground to look for new physics effects through a unitarity test of the Cabbibo-Kobayashi-Maskawa (CKM) matrix. We present a lattice QCD calculation of the scalar and the vector form factors (over a large q2 region including q2 = 0) associated with the D→ Klv semi-leptonic decay. This calculation will then allow us to determine the central CKM matrix element, Vcs in the Standard Model, by comparing the lattice QCD results for the form factors and the experimental decay rate. This form factor calculation has been performed on the Nf = 2 + 1 + 1 MILC HISQ ensembles with the physical light quark masses.

Lattice QCD Results and Prospects

2003 ◽  
Vol 18 (supp01) ◽  
pp. 1-26
Author(s):  
Richard Kenway
Keyword(s):  
Standard Model ◽  
Lattice Qcd ◽  
Strong Interaction ◽  
Bound States ◽  
Leading Edge ◽  
Beyond The Standard Model ◽  
Quark Masses ◽  
The Standard Model ◽  
Quark Flavour ◽  
Computationally Intensive

In the Standard Model, quarks and gluons are permanently confined by the strong interaction into hadronic bound states. The values of the quark masses and the strengths of the decays of one quark flavour into another cannot be measured directly, but must be deduced from experiments on hadrons. This requires calculations of the strong-interaction effects within the bound states, which are only possible using numerical simulations of lattice QCD. These are computationally intensive and, for the past twenty years, have exploited leading-edge computing technology. In conjunction with experimental data from B Factories, over the next few years, lattice QCD may provide clues to physics beyond the Standard Model. These lectures provide a non-technical introduction to lattice QCD, some of the recent results, QCD computers, and the future prospects.

B − L extension of the Standard Model based on Σ(18) symmetry for fermion mass and mixing

2020 ◽  
Vol 35 (27) ◽  
pp. 2050223
Author(s):  
V. V. Vien
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Neutrino Mass ◽  
Tree Level ◽  
Fermion Mass ◽  
Recent Experimental Data ◽  
Type I ◽  
Quark Masses ◽  
The Standard Model ◽  
Experimental Values

In this work, we suggest a renormalizable [Formula: see text] extension of the Standard Model with [Formula: see text] symmetry in which the observed fermion mass and mixing pattern is consistent with the experimental values given in Ref. 1 at the tree-level. The neutrino mass ordering and the tiny neutrino masses are induced by the type-I seesaw mechanism. The effective neutrino mass parameters are predicted to be [Formula: see text], [Formula: see text] for NO and [Formula: see text], [Formula: see text] for IO which are well consistent with the recent experimental data. The quark masses are in good agreement while the quark mixing matrix has a little difference with the experimental data taken from Ref. 1 and the Cabibbo angle [Formula: see text] is related to the model parameter [Formula: see text] by the formula [Formula: see text].

η DECAYS WITH WASA DETECTOR

2005 ◽  
Vol 20 (02n03) ◽  
pp. 536-538
Author(s):  
◽  
ANDRZEJ KUPŚĆ
Keyword(s):  
Standard Model ◽  
Light Quark ◽  
Storage Rings ◽  
Low Energy ◽  
Eta Mesons ◽  
Valuable Source ◽  
Quark Masses ◽  
Experimental Programme ◽  
The Standard Model ◽  
Source Of Information

Experimental programme of eta decays carried out at WASA detector is presented. Not-so-rare eta decays are well suited as a low energy QCD laboratory. For example decay η→3π is a valuable source of information on light quark masses. In very rare eta decays such as η→e+e- and η→π°e+e- fundamental aspects of the Standard Model can be tested. Production reactions – sources of eta mesons for the decay studies at storage rings such as CELSIUS and COSY are discussed. Prospects of eta decay physics for WASA@COSY are presented.

scholarly journals Theoretical ceiling on quark masses in the standard model

1985 ◽  
Vol 153 (3) ◽  
pp. 165-168 ◽  
Author(s):  
M.J. Duncan ◽  
R. Philippe ◽  
Marc Sher
Keyword(s):  
Standard Model ◽  
Quark Masses ◽  
The Standard Model

scholarly journals QUARK MASSES AND WEAK COUPLINGS IN THE SM AND BEYOND

2002 ◽  
Vol 17 (22) ◽  
pp. 3059-3067
Author(s):  
RICCARDO BARBIERI
Keyword(s):  
Standard Model ◽  
Empirical Adequacy ◽  
Quark Masses ◽  
The Standard Model

I discuss two topics: i) the empirical adequacy of the Standard Model in the Flavour Sector in view of recent data; ii) the possible existence of a hidden structure in the quark masses and mixings based on textures.

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