Measurement of τ polarization in e + e − annihilation at √ s = 58 GeV
نویسندگان
چکیده
منابع مشابه
توزیع چندگانگی ذرات باردار در نابودی +e-e در انرژی مرکز جرم GeV54-57 و مقیاس KNO
In this paper, we investigate the multiplicity of charged particles in e+ e– annihilation by using different models. To achieve this we first fit the multiplicity distribution of charged particles in the energy range of 54-57 GeV by using both the Poisson distribution and KNO scaling, then we compare these results with multiplicity distribution at the lower energies. This comparison shows that...
متن کاملMeasurement of the τ̃ - χ̃ 01 Mass Difference and M g̃ in the Co - Annihilation Region at the LHC
We study the prospects for the measurement of the τ̃ χ̃1 mass difference (∆M) and the g̃ mass (Mg̃) in the supersymmetric co-annihilation region at the LHC using tau leptons. Recent WMAP measurements of the amount of cold dark matter and previous accelerator experiments indicate that the allowed parameter space of mSUGRA is characterized by a small ∆M (515 GeV). Focusing on taus from χ̃2→τ τ̃→ττχ̃1 de...
متن کاملPolarized J/ψ Production at CLEO
Polarizations of the prompt J/ψ’s produced in the e+e− annihilation at CLEO energy ( √ s = 10.58 GeV) are considered in the framework of NRQCD factorization formalism. We find that the J/ψ polarization has strong dependence on the production mechanism. At CLEO energy, the most dominant J/ψ production mechanism in the most phase space is the color-singlet mechanism, e+e− → J/ψ+gg, for which J/ψ’...
متن کاملProbing Msugra Models at Linear Colliders A
A feasibility study of a 500-GeV linear collider is presented for mSUGRA models in co-annihilation region. We find an active mask is critical to suppress e + e − → e + e − τ + τ − events to probe the models. The grand unification of the three gauge coupling constants arise naturally in minimal SUGRA (mSUGRA) models with universal soft breaking parameters (m 1/2 , m 0 , A 0 , tan β, sign of µ). ...
متن کاملDetection of SUSY Signals in Stau Neutralino Co-annihilation Region at the LHC
We study the prospects of detecting the signal in the stau neutralino (τ̃1-χ̃ 1 ) coannihilation region at the LHC using tau (τ) leptons. The co-annihilation signal is characterized by the τ̃1 and χ̃0 1 mass difference (∆M) to be 5-15 GeV to be consistent with the WMAP measurement of the cold dark matter relic density as well as all other experimental bounds within the minimal supergravity model. F...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997