搜索结果: 1-15 共查到“理学 baryons”相关记录22条 . 查询时间(0.045 秒)
Simulation of soft X-ray emission lines from the missing baryons
theory diff use radiation large-scale structure of universe
2014/12/24
We study the soft X-ray emission (0.1-1 keV) from the warm-hot intergalactic medium (WHIM) in a hydrodynamic simulation of a cold dark matter universe. Our main goal is to investigate how such emissio...
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 ...
Galaxy-galaxy lensing constraints on the relation between baryons and dark matter in galaxies in the Red Sequence Cluster Survey 2
gravitational lensing: weak - galaxies: formation - galaxies: halos
2011/10/12
We present the results of a study of weak gravitational lensing by galaxies using imaging data that were obtained as part of the second Red Sequence Cluster Survey (RCS2). In order to compare to the b...
We suggest the existence of a fundamental connection between baryonic and dark matter. This is motivated by both the stability of these two types of matter as well as the observed similarity of their ...
Baryon-density perturbations of large amplitude may exist if they are compensated by dark-matter perturbations so that the total density remains unchanged. Big-bang nucleosynthesis and galaxy clusters...
Intergalactic Gas in Groups of Galaxies: Implications for Dwarf Spheroidal Formation and The Missing Baryons Problem
Implications Spheroidal Formation Missing Baryons
2011/9/28
Radio galaxies with bent jets are predominantly located in groups and clusters of galaxies. We use bent-double radio sources, under the assumption that their jets are bent by ram-pressure, to probe in...
A Census of Baryons and Dark Matter in an Isolated, Milky Way-sized Elliptical Galaxy
Baryons Dark Matter Milky Way-sized Elliptical Galaxy
2011/1/13
We present a study of the dark and luminous matter in the isolated elliptical galaxy NGC720, based on deep X-ray observations made with Chandra and Suzaku. The gas is reliably measured to ~R2500, allo...
Magnetic Moments of Negative-Parity Baryons from Lattice QCD
Negative-Parity Baryons Lattice QCD
2011/1/7
We report preliminary results for the magnetic moments of negative-parity baryons extracted from mass shifts in the presence of static external magnetic fields. The calculations are done on $24^3\time...
Heavy Quark Spin Symmetry and Heavy Baryons: Electroweak Decays
Heavy Quark Spin Symmetry Heavy Baryons Electroweak Decays
2011/1/7
Heavy quark spin symmetry is discussed in the context of single and doubly heavy baryons. A
special attention is paid to the constraints/simplifications that this symmetry imposes on the non-relativi...
We present measurements of the masses and widths of four bottom baryon resonances, S ()±
b ,reconstructed in the L0 bp± hadron decay modes.
Heavy Quark Spin Symmetry and Heavy Baryons: Electroweak Decays
Heavy Quark Spin Symmetry Heavy Baryons Electroweak Decays
2011/1/5
Heavy quark spin symmetry is discussed in the context of single and doubly heavy baryons. A
special attention is paid to the constraints/simplifications that this symmetry imposes on the non-relativi...
Magnetic Moments of Negative-Parity Baryons from
Magnetic Moments Negative-Parity Baryons from
2011/1/14
We report preliminary results for the magnetic moments of negative-parity baryons extracted
from mass shifts in the presence of static external magnetic fields. The calculations are done on\ 243 48 ...
Radiative decays of dynamically generated charmed baryons
Radiative decays of dynamically charmed baryons
2011/1/10
In this work we study the radiative decay of dynamically generated JP = 12 − charm baryons into the ground state JP = 1 2 + baryons. Since different theoretical interpretations of these baryonic...
We show that a purely s-wave interaction in three dimensions (3D) can induce higher partialwave
resonances in mixed dimensions. We develop two-body scattering theories in all three cases of
0D-3D, 1...
Sea quark contents of octet baryons
balance model meson cloud model chiral quark model flavor asymmetry
2010/3/16
The flavor asymmetry of the nucleon sea, i.e., the excess of $d\bar{d}$ quark-antiquark pairs over $u\bar{u}$ ones in the proton can be explained by several different models; therefore, it is a chal...