scholarly journals CP-violating phases in neutral meson oscillations

2012 ◽  
Vol 233 ◽  
pp. 84-89
Author(s):  
Daan van Eijk
Keyword(s):  
Neutral Meson

Neutral-Meson production in a quark model

1968 ◽  
Vol 55 (4) ◽  
pp. 671-678 ◽  
Author(s):  
G. C. Joshi
Keyword(s):  
Quark Model ◽  
Meson Production ◽  
Neutral Meson

scholarly journals New limits on tanβ for 2HDMs with Z2 symmetry

2015 ◽  
Vol 30 (26) ◽  
pp. 1550158 ◽  
Author(s):  
Dipankar Das
Keyword(s):  
Lower Limit ◽  
Scalar Potential ◽  
Higgs Doublet ◽  
Exact Formula ◽  
Meson Mass ◽  
Neutral Meson ◽  
Breaking Parameter ◽  
Two Higgs Doublet Models ◽  
Breaking Term

In two-Higgs-doublet models with exact [Formula: see text] symmetry, putting [Formula: see text] at the alignment limit, the following limits on the heavy scalar masses are obtained from the conditions of unitarity and stability of the scalar potential: [Formula: see text], [Formula: see text], [Formula: see text] and [Formula: see text]. The constraints from [Formula: see text] and neutral meson mass differences, when superimposed on the unitarity constraints, put a tighter lower limit on [Formula: see text] depending on [Formula: see text]. It has also been shown that larger values of [Formula: see text] can be allowed by introducing soft breaking term in the potential at the expense of a correlation between [Formula: see text] and the soft breaking parameter.

Photon and neutral meson data from the collision of 200 A · GeV sulphur ions with gold targets

1993 ◽  
Vol 30 ◽  
pp. 353-362
Author(s):  
R. Santo ◽  
R. Albrecht ◽  
T.C. Awes ◽  
P. Beckmann ◽  
F. Berger ◽  
...  
Keyword(s):  
Neutral Meson

scholarly journals THE NORMALIZATION EFFECT OF NEUTRAL B0MESON ASYMMETRY

2006 ◽  
Vol 21 (12) ◽  
pp. 985-989
Author(s):  
J. C. YOON
Keyword(s):  
Cp Violation ◽  
Decay Rate ◽  
Experimental Analysis ◽  
B Physics ◽  
Neutral Meson ◽  
Normalization Effect

In the study of CP violation asymmetry in CPLEAR, the decay rate of neutral meson is normalized and its experimental analysis has been well established, while normalization effect has been considered in B physics. After investigation on the normalization effect in BABAR, we conclude that it can be justified to neglect this effect due to the suppressed decays that are contributed from both B0and [Formula: see text].

scholarly journals Averages of b-hadron, c-hadron, and $$\tau $$-lepton properties as of 2018

2021 ◽  
Vol 81 (3) ◽  
Author(s):  
Y. Amhis ◽  
Sw. Banerjee ◽  
E. Ben-Haim ◽  
F. U. Bernlochner ◽  
M. Bona ◽  
...  
Keyword(s):  
Branching Fractions ◽  
Semileptonic Decays ◽  
Tau Lepton ◽  
Neutral Meson ◽  
Matrix Elements ◽  
Common Input ◽  
Common Values ◽  
Mixing Parameters ◽  
Input Parameters ◽  
Meson Mixing

AbstractThis paper reports world averages of measurements of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties obtained by the Heavy Flavour Averaging Group using results available through September 2018. In rare cases, significant results obtained several months later are also used. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, $$C\!P$$ C P  violation parameters, parameters of semileptonic decays, and Cabibbo–Kobayashi–Maskawa matrix elements.

scholarly journals Non-strange dibaryons studied in coherent double neutral-meson photoproduction on the deuteron

2020 ◽  
Vol 241 ◽  
pp. 01007
Author(s):  
Takatsugu Ishikawa ◽  
Hisako Fujimura ◽  
Hiroshi Fukasawa ◽  
Ryo Hashimoto ◽  
Qinghua He ◽  
...  
Keyword(s):  
Invariant Mass Distribution ◽  
Center Of Mass ◽  
Resonance State ◽  
Angular Distributions ◽  
Neutral Meson ◽  
Mass Energy ◽  
Meson Photoproduction ◽  
Neutral Pions ◽  
Center Of Mass Energy ◽  
Interesting Object

The B = 2 bound/resonance state (dibaryon) is an interesting object, which can be a molecule consisting of two baryons or a spatially compact hexaquark hadron object. The yd ^ n°n°d reaction has been experimentally investigated at incident energies ranging from 0.58 to 1.15 GeV to study non-strange dibaryons. The angular distributions of deuteron emission in the yd center-of-mass energy cannot be reproduced by quasi-free production of two neutral pions followed by deuteron coalescence. Additionally a 2.14-GeV peak is observed in the n°d invariant mass distribution. These suggest a sequential process such as yd ^ RIS ^ n°RIV ^ n°n°d with an isoscalar dibaryon RIS and an isovector dibaryon RIV. Since the mass of the observed isoscalar dibaryons are close to the sum of the nucleon (N) and nucleon resonance (N*) masses, an S-wave NN* molecule may play a role as a doorway to a dibaryon.

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