Lepton polarization asymmetries in B → K 1ℓ+ℓ− decay as a searching tool for new physics

2013 ◽  
Vol 2013 (7) ◽  
Author(s):  
Saadi Ishaq ◽  
Faisal Munir ◽  
Ishtiaq Ahmed
Keyword(s):  
New Physics ◽  
Lepton Polarization

Study of Λb → Λℓ+ℓ− (ℓ = e,μ,τ) decays in the G(221) model

2016 ◽  
Vol 31 (36) ◽  
pp. 1650197
Author(s):  
Shuai-Wei Wang
Keyword(s):  
Sum Rules ◽  
Branching Ratio ◽  
Form Factors ◽  
New Physics ◽  
Tree Level ◽  
Decay Channels ◽  
Flavor Changing ◽  
The Standard Model ◽  
Lepton Polarization ◽  
Text Model

We study respectively the baryonic semilepton decays [Formula: see text][Formula: see text] in the [Formula: see text] model, which includes the tree-level flavor-changing-neutral-currents (FCNCs) induced by [Formula: see text] and [Formula: see text] bosons and modifies the Wilson coefficients [Formula: see text] and [Formula: see text]. For the form factors, we use the results of QCD light-cone sum rules (LCSR) in the low [Formula: see text] region and lattice QCD in the high [Formula: see text] region, respectively. We consider the effects of this new physics (NP) model on some measured physical observables, like the differential branching ratio, the longitudinal polarization of the dilepton system, the lepton-side forward–backward asymmetry and the baryon-side forward–backward asymmetry, and find, obvious differences occur in some observables between the Standard Model (SM) and this NP model. Meanwhile, we also discuss the double lepton polarization asymmetries of these decay channels, and find, [Formula: see text], [Formula: see text] and [Formula: see text] of these decay channels are sensitive to the contribution of this NP model.

Study of B̄s → ϕμ+μ− decays in the G(211) model and vector leptoquark model

2017 ◽  
Vol 32 (25) ◽  
pp. 1750155 ◽  
Author(s):  
Shuai-Wei Wang
Keyword(s):  
Standard Model ◽  
Large Deviation ◽  
Branching Fraction ◽  
New Physics ◽  
Decay Process ◽  
Angular Distributions ◽  
The Standard Model ◽  
Lepton Polarization ◽  
Text Model

We study [Formula: see text] decay in the [Formula: see text] model and vector leptoquark model, respectively. We consider the effects of these two new physics (NP) models on some measured physical observables of this decay process, such as the differential branching fraction and the angular distributions. We find that the large deviation of the differential branching fraction between the measurement and the Standard Model (SM) prediction can be explained in these two NP models. However, we found that not all observables of the double-lepton polarization asymmetries are sensitive to the contributions of these NP models.

scholarly journals Charged Higgs contribution on Bc → (Ds, Ds*) l+l−

2020 ◽  
Vol 2020 (5) ◽  
Author(s):  
P Maji ◽  
S Biswas ◽  
P Nayek ◽  
S Sahoo
Keyword(s):  
Branching Ratio ◽  
Form Factors ◽  
Higgs Doublet ◽  
New Physics ◽  
Model Parameters ◽  
Type I ◽  
The Standard Model ◽  
Charged Higgs ◽  
Lepton Polarization ◽  
Meson States

Abstract In this paper, we study rare semileptonic decays of the $B_c$ meson in the context of type-I, II, and III two Higgs doublet models. We follow the relativistic quark model for parameterizing the form factors used in matrix elements of weak transitions between the corresponding meson states. We investigate observables such as branching ratio, lepton polarization asymmetry, forward–backward asymmetry, etc. and analyze the dependence of these quantities on the model parameters. We have found that there is noticeable sensitivity to these observables for the charged Higgs boson, which may provide a powerful probe to the standard model and new physics beyond it.

scholarly journals THE EFFECTS OF NONSTANDARD Z COUPLINGS ON THE LEPTON POLARIZATIONS IN Bs→γℓ+ℓ-DECAYS

2005 ◽  
Vol 20 (07) ◽  
pp. 533-542 ◽  
Author(s):  
GÜRSEVIL TURAN
Keyword(s):  
Branching Ratios ◽  
New Physics ◽  
Lepton Polarization ◽  
Specific Scenario

The fact that the measured B→ππ, πK branching ratios exhibit puzzling patterns has received a lot of attention in the literature and motivated the formulation of a series of new physics scenarios with enhanced Z-penguins. Here, we analyze the effect of such an enhancement on the lepton polarization asymmetries of Bs→γℓ+ℓ-decays by applying the results of a specific scenario for the solution of "B→πK puzzle".

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.

Reflections into the Spirit of the Islamic Corpus of Knowledge and the Rise of the New Science

1993 ◽  
Vol 10 (2) ◽  
pp. 153-164
Author(s):  
Mahmoud Dhaouadi
Keyword(s):  
Social Sciences ◽  
Third World ◽  
New Physics ◽  
Western Civilization ◽  
Western Science ◽  
New Science ◽  
Scientific Disciplines ◽  
The World ◽  
The Future ◽  
Primary Reference

There is no question that contemporary western civilization has beendominant in the field of science since the Renaissance. Western scientificsuperiority is not limited to specific scientific disciplines, but is rather anovetall scientific domination covering both the so-called exact and thehuman-social sciences. Western science is the primary reference for specialistsin such ateas as physics, chemistry, biology, medicine, economics,psychology, and sociology. It is in this sense that Third World underdevelopmentis not only economic, social, and industrial; it also suffersfrom scientific-cultutal underdevelopment, or what we call "The OtherUnderdevelopment" (Dhaouadi 1988).The imptessive progress of western science since Newton and Descartesdoes not meari, however, that it has everything tight or perfect. Infact, its flaws ate becoming mote visible. In the last few decades, westernscience has begun to experience a shift from what is called classical scienceto new science. Classical science was associated with the celestialmechanics of Copernicus, Kepler, Newton, the new physics of Galileo,and the philosophy of Descartes. Descartes introduced a radical divisionbetween mind and matter, while Newton and his fellows presented a newscience that looked at the world as a kind of giant clock The laws of thisworld were time-reversible, for it was held that there was no differencebetween past and future. As the laws were deterministic, both the pastand the future could be predicted once the present was known.The vision of the emerging new science tends to heal the division betweenmatter and spirit and to do away with the mechanical dimension ...

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