scholarly journals Search for new physics in rare top decays:tt¯spin correlations and other observables

2014 ◽  
Vol 90 (9) ◽  
Author(s):  
Ken Kiers ◽  
Pratishruti Saha ◽  
Alejandro Szynkman ◽  
David London ◽  
Samuel Judge ◽  
...  
Keyword(s):  
New Physics ◽  
Spin Correlations

scholarly journals Time-reversal asymmetries and angular distributions in Λb → ΛV

2021 ◽  
Vol 2021 (11) ◽  
Author(s):  
Chao-Qiang Geng ◽  
Chia-Wei Liu
Keyword(s):  
Time Reversal ◽  
Branching Ratio ◽  
New Physics ◽  
Angular Distributions ◽  
Factorization Approach ◽  
Spin Correlations ◽  
Angular Momenta ◽  
Pseudoscalar Mesons ◽  
Helicity Amplitudes ◽  
Cp Asymmetries

Abstract We study the spin correlations to probe time-reversal (T) asymmetries in the decays of Λb→ ΛV (V = ϕ, ρ0, ω, K∗0). The eigenstates of the T-odd operators are obtained along with definite angular momenta. We obtain the T-odd spin correlations from the complex phases among the helicity amplitudes. We give the angular distributions of Λb→ Λ(→ pπ−)V (→ PP′) and show the corresponding spin correlations, where P(′) are the pseudoscalar mesons. Due to the helicity conservation of the s quark in Λ, we deduce that the polarization asymmetries of Λ are close to −1. Since the decay of Λb→ Λϕ in the standard model (SM) is dictated by the single weak phase from the product of CKM elements, $$ {V}_{tb}{V}_{ts}^{\ast } $$ V tb V ts ∗ , the true T and CP asymmetries are suppressed, providing a clean background to test the SM and search for new physics. In the factorization approach, as the helicity amplitudes in the SM share the same complex phase, T-violating effects are absent. Nonetheless, the experimental branching ratio of Br(Λb→ Λϕ) = (5.18 ± 1.29) × 10−6 suggests that the nonfactorizable effects or some new physics play an important role. By parametrizing the nonfactorizable contributions with the effective color number, we calculate the branching ratios and direct CP asymmetries. We also explore the possible T-violating effects from new physics.

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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