scholarly journals Optimal-observable analysis of possible new physics using the b-quark in γγ→tt̄→bX

2004 ◽  
Vol 593 (1-4) ◽  
pp. 189-197 ◽  
Author(s):  
Bohdan Grzadkowski ◽  
Zenrō Hioki ◽  
Kazumasa Ohkuma ◽  
José Wudka
Keyword(s):  
New Physics ◽  
Optimal Observable ◽  
B Quark

scholarly journals TRIPLE-PRODUCT CORRELATIONS IN B→V1V2 DECAYS AND NEW PHYSICS

2004 ◽  
Vol 19 (15) ◽  
pp. 2505-2544 ◽  
Author(s):  
ALAKABHA DATTA ◽  
DAVID LONDON
Keyword(s):  
State Vector ◽  
New Physics ◽  
Triple Product ◽  
Beyond The Standard Model ◽  
B Decays ◽  
Final State ◽  
Angular Analysis ◽  
The Standard Model ◽  
The Right ◽  
B Quark

In this paper we examine T-violating triple-product correlations (TP's) in B→V1V2 decays. TP's are excellent probes of physics beyond the standard model (SM) for two reasons: (i) within the SM, most TP's are expected to be tiny, and (ii) unlike direct CP asymmetries, TP's are not suppressed by the small strong phases which are expected in B decays. TP's are obtained via the angular analysis of B→V1V2. In a general analysis based on factorization, we demonstrate that the most promising decays for measuring TP's in the SM involve excited final-state vector mesons, and we provide estimates of such TP's. We find that there are only a handful of decays in which large TP's are possible, and the size of these TP's depends strongly on the size of nonfactorizable effects. We show that TP's which vanish in the SM can be very large in models with new physics. The measurement of a nonzero TP asymmetry in a decay where none is expected would specifically point to new physics involving large couplings to the right-handed b-quark.

scholarly journals Electroweak gauge-boson production in association with b jets at Hadron Colliders

2015 ◽  
Vol 30 (16) ◽  
pp. 1530042 ◽  
Author(s):  
F. Febres Cordero ◽  
L. Reina
Keyword(s):  
Large Hadron Collider ◽  
Gauge Boson ◽  
Hadron Collider ◽  
New Physics ◽  
Distribution Functions ◽  
Experimental Measurements ◽  
Cern Large Hadron Collider ◽  
Electroweak Gauge Boson ◽  
Theoretical Predictions ◽  
B Quark

The production of both charged and neutral electroweak gauge bosons in association with b jets has attracted a lot of experimental and theoretical attention in recent years because of its central role in the physics programs of both the Fermilab Tevatron and the CERN Large Hadron Collider. The improved level of accuracy achieved both in the theoretical predictions and experimental measurements of these processes can promote crucial developments in modeling b-quark jets and b-quark parton distribution functions, and can provide a more accurate description of some of the most important backgrounds to the measurement of Higgs-boson couplings and several new physics searches. In this paper, we review the status of theoretical predictions for cross sections and kinematic distributions of processes in which an electroweak gauge boson is produced in association with up to two b jets in hadronic collisions, namely [Formula: see text], pp → V + 1b jet and [Formula: see text], pp → V + 2b jets with V = W±, Z/γ*, γ. Available experimental measurements at both the Fermilab Tevatron and the CERN Large Hadron Collider are also reviewed and their comparison with theoretical predictions is discussed.

scholarly journals Search for single production of vector-like B quark decaying to bZ at future linear colliders

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
Lin Han ◽  
Jie-Fen Shen
Keyword(s):  
Linear Collider ◽  
Decay Channel ◽  
High Energy ◽  
New Physics ◽  
Beyond The Standard Model ◽  
The Standard Model ◽  
Linear Colliders ◽  
Single Production ◽  
Model Independent ◽  
B Quark

AbstractNew vector-like quarks are predicted in many new physics scenarios beyond the Standard Model (SM). Based on a model-independent framework, we investigate the prospect of discovering the SU(2) singlet vector-like bottom quark (VLQ-B) in $$e^{+}e^{-}$$ e + e - collisions at 3 TeV Compact Linear Collider. We study the single VLQ-B production process $$e^{-}e^{+}\rightarrow B{\bar{b}}\rightarrow Zb{\bar{b}}$$ e - e + → B b ¯ → Z b b ¯ with two types of decay channel: $$Z\rightarrow \ell ^{+}\ell ^{-}$$ Z → ℓ + ℓ - , and $$Z\rightarrow \nu {\bar{\nu }}$$ Z → ν ν ¯ . By carrying out a full simulation for the signals and the relevant SM backgrounds, the $$2\sigma $$ 2 σ exclusion limit and $$5\sigma $$ 5 σ discovery prospects are, respectively, obtained on the B quark mass and the coupling strength $$g^{*}$$ g ∗ with the integrated luminosity of 5 $$\hbox {ab}^{-1}$$ ab - 1 . Our numerical results show that the possible signals of the singlet VLQ-B might be detected at the future high-energy $$e^{+}e^{-}$$ e + e - linear colliders.

scholarly journals INVISIBLE HIGGS IN WEAK BOSONS ASSOCIATIVE PRODUCTION WITH HEAVY QUARKS AT LHC: PROBING MASS AND WIDTH

2011 ◽  
Vol 26 (19) ◽  
pp. 3201-3218 ◽  
Author(s):  
E. E. BOOS ◽  
S. V. DEMIDOV ◽  
D. S. GORBUNOV
Keyword(s):  
Higgs Boson ◽  
Invariant Mass Distribution ◽  
New Physics ◽  
Heavy Quarks ◽  
Boson Mass ◽  
Tree Level ◽  
Boson Pair ◽  
Weak Boson ◽  
Decay Modes ◽  
B Quark

New physics coupled to the Higgs boson may hide it in the standard decay channels to be investigated at LHC. We consider the models where new invisible dominant decay modes of the Higgs boson are responsible for this hiding. We propose to study at LHC the weak boson production associated with heavy quarks: our analysis revealed that boson pair invariant mass distribution is sensitive to both mass and width of the invisible Higgs boson, if it is not too far from the weak boson pair threshold. We present tree-level results for the most relevant cases of top quarks and of bottom quarks in Standard Model extensions with large b-quark Yukawa coupling. We argue that QCD corrections do not spoil these results allowing for unambiguous extraction of the Higgs boson mass and width from the analysis of large enough amount of data.

scholarly journals Optimal-observable analysis of possible new physics inB→D(*)τντ

2016 ◽  
Vol 93 (3) ◽  
Author(s):  
Srimoy Bhattacharya ◽  
Soumitra Nandi ◽  
Sunando Kumar Patra
Keyword(s):  
New Physics ◽  
Optimal Observable

scholarly journals THE TOP PRIORITY: PRECISION ELECTROWEAK PHYSICS FROM LOW TO HIGH ENERGY

2004 ◽  
Vol 19 (06) ◽  
pp. 808-820 ◽  
Author(s):  
P. GAMBINO
Keyword(s):  
Precise Measurement ◽  
High Energy ◽  
New Physics ◽  
Precision Data ◽  
The Standard Model ◽  
B Quark ◽  
Electroweak Precision ◽  
Top Mass ◽  
Electroweak Precision Data

Overall, the Standard Model describes electroweak precision data rather well. There are however a few areas of tension (charged current universality, NuTeV, (g-2)μ, b quark asymmetries), which I review critically, emphasizing recent theoretical and experimental progress. I also summarize what precision data tell us about the Higgs boson and new physics scenarios. In this context, the role of a precise measurement of the top mass is crucial.

scholarly journals Status of rare exclusive B meson decays in 2018

2018 ◽  
Vol 33 (18n19) ◽  
pp. 1830016 ◽  
Author(s):  
Johannes Albrecht ◽  
Stefanie Reichert ◽  
Danny van Dyk
Keyword(s):  
B Meson ◽  
Experimental Situation ◽  
Neutral Current ◽  
New Physics ◽  
Beyond The Standard Model ◽  
Lepton Flavor ◽  
Flavor Changing ◽  
Theoretical Status ◽  
Flavor Changing Neutral Current ◽  
B Quark

This review discusses the present experimental and theoretical status of rare flavor-changing neutral current b-quark decays at the beginning of 2018. It includes a discussion of the experimental situation and details of the currently observed anomalies in measurements of flavor observables, including lepton flavor universality. Progress on the theory side within and beyond the Standard Model theory is also discussed, together with potential New Physics interpretations of the present measurements.

Tevatron teams clash over new physics

Nature ◽  
2011 ◽  
Author(s):  
Eugenie Samuel Reich
Keyword(s):  
New Physics

INTEGRASI NILAI-NILAI PAI KE MATA PELAJARAN FISIKA UNTUK MENUMBUHKAN DOMAIN AFEKTIF SISWA

Edupedia ◽  
2018 ◽  
Vol 3 (1) ◽  
pp. 77-88
Author(s):  
Ali Fatoni
Keyword(s):  
Education Program ◽  
New Physics ◽  
Teaching Skills ◽  
Training And Education ◽  
Simple Description ◽  
The World ◽  
Teachers Training ◽  
Scientific Integration ◽  
Spiritual Attitude ◽  
Islamic Values

The integration of science is discussed today. The figures in this issue appear in the world. Mentioned among them Naquib al-Attas,and in Indonesia who keen to speak scientific integration is Amin Abdullah.This speech led to the birth of the 2013Curriculum in Indonesia with the demands of all subjects must contain a spiritual attitude (KI-1). This creates difficulties for teachers. Training and education program for teacher in applying The 2013 Curriculum is not technically in touch with their difficulties.Training and education program for teachermostly touchonly on aspects of teaching skills. This research is present to fill the gap that has not been filled by thattraining and education program. The results of this study is a simple description of the process of developing a physics textbook that begins from the study of old books and relevant theories for thisnew developmenttextbook to compiled new physics textbookincluding the content of Islamic values.

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