搜索结果: 1-15 共查到“理学 quarks”相关记录33条 . 查询时间(0.062 秒)
中国科学院上海天文台ALMA-QUARKS项目首批成果发布——揭示大质量恒星形成区的精细结构（图）
恒星 结构 银河系
2024/12/23
太阳只是银河系千亿恒星中最普普通通的一员，是“个头”比较小的矮星。银河系或者宇宙中存在比太阳个头大几十倍甚至上百倍的恒星。大质量恒星特指那些质量大于8个太阳质量的恒星，它们虽然稀少，但通过超新星爆发、电离氢区、强星风和紫外光子辐射等深刻影响着星系的结构和物质演化。目前天文学家观测到的最大质量恒星是位于大麦哲云的BAT99-98和R136a1，质量可达200倍太阳质量。然而，大质量恒星是如何累积如此...
Today, at the Moriond conference, the ATLAS and CMS collaborations have both presented the observation of a very rare process: the simultaneous production of four top quarks. They were observed using ...
Unlike electrons, quarks cannot wander freely in ordinary matter. They are confined by the strong force within hadrons such as the protons and neutrons that make up atomic nuclei. However, at very hig...
Final state interactions in the decay of heavy quarks
Secondary scattering B meson duality
2014/12/23
I discuss some recent results on the systematic behavior of final state rescattering which makes use of the limit of a heavy B meson. The results suggest that soft final state interactions do not disa...
Chiral corrections to the vector and axial couplings of quarks and baryons
Vector the axial quark coupling lorentz covariance coupling control octet weight baryon matrix elements
2014/12/19
We calculate chiral corrections to the semileptonic vector and axial quark coupling constants using a manifestly Lorentz covariant chiral quark approach up to order O(p4) in the two- and three-flavor ...
NEWPORT NEWS, VA, Feb. 5, 2014 – From matching wings on butterflies to the repeating six-point pattern of snowflakes, symmetries echo through nature, even down to the smallest building blocks of matte...
Properties of quarks and mesons in the Dyson-Schwinger/Bethe-Salpeter approach
Dyson-Schwinger/Bethe-Salpeter mesons
2011/7/21
In this thesis, the Dyson-Schwinger - Bethe-Salpeter formalism is investigated and used to study the meson spectrum at zero temperature, as well as the chiral phase transition in finite-temperature QC...
Model-Independent Searches for New Quarks at the LHC 。
Baryon spectroscopy and heavy quarks 。
Classical quarks in dual electromagnetic fields
Classical quarks dual electromagnetic fields
2011/1/18
Electromagnetic properties of quark-like particles are examined in a classical field model involving extended dual electromagnetic fields. These can have fractional charges and a confining potential t...
Spectral properties of quarks above Tc -- thermal mass, dispersion relation, and self-energy --
Spectral properties quarks above Tc -- thermal mass
2011/1/6
Spectral properties of quarks above the critical temperature for deconfinement are analyzed in quenched lattice QCD on lattices of size 128^3x16. We study quark spectral function in energy and momentu...
Spectral properties of quarks above Tc -- thermal mass, dispersion relation, and self-energy --
Spectral properties quarks above Tc -- thermal mass
2011/1/6
Spectral properties of quarks above the critical temperature for deconfinement are analyzed in quenched lattice QCD on lattices of size 128^3x16. We study quark spectral function in energy and momentu...
Mass matrices of twice four families of quarks and leptons, scalars and gauge fields as predicted by the ''spin-charge-family-theory''
Mass matrices scalars spin-charge-family-theory
2010/12/27
The theory unifying spin and charges and predicting families, proposed as a new way to explain the assumptions of the standard model of the electroweak and colour interactions, predicts at the low ene...
EOS in 2+1 flavor QCD with improved Wilson quarks by the fixed-scale approach
EOS 2+1 flavor QCD improved Wilson quarks
2011/1/6
We present the status of our study on the equation of state in 2+1 flavor QCD with non-perturbatively improved Wilson quarks coupled with the RG improved glue. We apply the T-integration method to non...
EOS in 2+1 flavor QCD with improved Wilson quarks by the fixed-scale approach
EOS 2+1 flavor QCD improved Wilson quarks
2011/1/6
We present the status of our study on the equation of state in 2+1 flavor QCD with non-perturbatively improved Wilson quarks coupled with the RG improved glue. We apply the T-integration method to non...