نتایج جستجو برای: gev
تعداد نتایج: 18737 فیلتر نتایج به سال:
Results from a one day √ sNN = 19.6 GeV Au+Au test run at RHIC using the STAR detector are presented. The quality of these results from only 175,000 triggered events demonstrates some of STAR’s physics capabilities for the upcoming beam energy scan at RHIC. From these 19.6 GeV Au+Au collisions, we have analyzed the transverse mass spectra of π, K, p, and p̄ at midrapidity and mT − m0 < 1.0 GeV/c...
We update the non-perturbative function of the Collins-Soper-Sterman (CSS) resummation formalism which resums the large logarithmic terms originating from multiple soft gluon emission in hadron collisions. Two functional forms in impact parameter (b) space are considered, one with a pure Gaussian form with two parameters and another with an additional linear term. The results for the two parame...
In this work, we explain the 750 GeV diphoton resonance in the Next-to-Minimal Supersymmetric Standard Model (NMSSM) by introducing vector-like particles. Such an extension is well motivated from the top-down view since some grand unified theories usually predict the existence of singlet scalars and vector-like particles at weak scale. In our model, the 750 GeV resonance can be interpreted as t...
Significant progress has been made since 1996 in the determination of the light quark masses from both lattice QCD (LQCD) and QCD sumrules (SR). The evolution in time of the ranges quoted by the Particle Data Group and our best estimates as of DPF2000 are given below. Since the scale dependence between 2 and 1 GeV is very large, we quote all results in the MS scheme at scale μ = 2 GeV. Results ...
Exclusive electroproduction of ρ mesons has been measured using the ZEUS detector at HERA in two Q ranges, 0.25 < Q < 0.85 GeV and 3 < Q < 30 GeV. The low-Q data span the range 20 < W < 90 GeV; the high-Q data cover the 40 < W < 120 GeV interval. Both samples extend up to four-momentum transfers of |t| = 0.6 GeV. The distribution in the azimuthal angle between the positron scattering plane and ...
در این پایان نامه با خصوصیات پدیده انفجارات پرتو گاما و انواع این انفجارات آشنا شده و به بررسی مکانیزم و منشأ تولید آنها خواهیم پرداخت. در مورد منابع کهکشانی و برون کهکشانی و هم چنین اندازهگیری فاصله آنها از روی جابجایی به سمت ناحیه قرمز طیف انرژی آنها بحث خواهیم کرد. فوتونهای تولیدی انفجارات پرتو گاما در دامنه انرژی از مرتبه kev تا tev میباشد. ما مطالعه بهمنهای گسترده هوایی ایجاد شده توسط ...
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. The J /ψ p T spectrum and nuclear modification factor (R AA) are reported for p T < 5 GeV/c and |y| < 1 from 0% to ...
This short review aims at presenting the way we currently understand, model, and constrain the transport of cosmic rays in the GeV-TeV energy domain. This is a research field per se, but is also an important tool e.g. to improve our understanding of the cosmic-ray sources, of the diffuse non-thermal Galactic emissions (from radio wavelengths to gamma-rays), or in searches for dark matter annihi...
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