Results 51 to 60 of about 257,743 (313)

Early-Universe constraints on dark matter-baryon scattering and their implications for a global 21 cm signal [PDF]

Physical Review D, 2018
We present and compare several cosmological constraints on the cross section for elastic scattering between dark matter (DM) and baryons, for cross sections with a range of power-law dependences on the DM-baryon relative velocity $v$, especially focusing
T. Slatyer, Chih-Liang Wu
semanticscholar   +1 more source

Many-Quark Interactions: Large-N Scaling and Contribution to Baryon Masses

Universe, 2022
Starting from an effective Hamiltonian modeling, of a baryon made of N identical quarks in the large-N approach of QCD, we obtain analytical formulas, allowing to estimate the contributions of multiquark interactions to the baryon mass.
Fabien Buisseret, Cintia T. Willemyns, Claude Semay   +2 more
doaj   +1 more source

On the Baryon Fractions in Clusters and Groups of Galaxies [PDF]

, 2010
We present the baryon fractions of 2MASS groups and clusters as a function of cluster richness using total and gas masses measured from stacked ROSAT X-ray data and stellar masses estimated from the infrared galaxy catalogs. We detect X-ray emission even
Anderson, Baldi, Bell, Bialek, Bullock, Christopher S. Kochanek, Dai, David, Davé, Dunkley, Elena Rasia, Gavazzi, Giodini, Gonzalez, Gonzalez, Gottlöber, Hasinger, Hoekstra, Jiang, Joel N. Bregman, Kaiser, Kauffmann, Klypin, Kochanek, Kochanek, Koester, Koposov, Krick, McGaugh, Moore, Navarro, Rasia, Ricotti, Rykoff, Simon, Skrutskie, Somerville, Spergel, Stanek, Stanek, Stark, Sun, Vikhlinin, Vikhlinin, Voges, Walker, White, Wu, Xinyu Dai, Xu, Xue   +50 more
core   +1 more source

A Note on Baryon-Baryon Interaction [PDF]

Progress of Theoretical Physics, 1961
The process of a ( XI /sup -/ n) collision giving rise to hyperon systems is studied, the possibility of a bound state in the final system being also envisaged. The implication arising from the various parity assignments for the hyperons is discussed and the decay distribution of the possible bound system is analyzed. (L.N.N.)
G. Bhamathi, S. Indumathi, T. K. Radha, R. Thunga   +3 more
openaire   +1 more source

Baryon-Baryon Interactions [PDF]

Progress of Theoretical Physics Supplement, 2010
Summary: We review the Nijmegen extended-soft-core (ESC) models for the baryon-baryon (\(BB\)) interactions of the \(SU(3)\) flavor-octet of baryons \((N, \Lambda , \Sigma \), and \(\Xi )\). The interactions are basically studied from the meson-exchange point of view, in the spirit of the Yukawa-approach to the nuclear force problem [\textit{H. Yukawa},
Rijken, T.A., Nagels, M.M., Yamamoto, Y.
openaire   +2 more sources

Hadron resonance gas with repulsive interactions and fluctuations of conserved charges

Physics Letters B, 2018
We discuss the role of repulsive baryon–baryon interactions in a hadron gas using relativistic virial expansion and repulsive mean field approaches. The fluctuations of the baryon number as well as strangeness-baryon correlations are calculated in the ...
Pasi Huovinen, Peter Petreczky
doaj   +1 more source

Baryonic content of the pion

Physics Letters B, 2021
The baryon form factor of charged pions arises since isospin symmetry is broken. We obtain estimates for this basic property in two phenomenological ways: from simple constituent quark models with unequal up and down quark masses, and from fitting to e+e−
Pablo Sanchez-Puertas, Enrique Ruiz Arriola, Wojciech Broniowski   +2 more
doaj   +1 more source

Baryon Number Fluctuation and the Quark-Gluon Plasma [PDF]

, 2001
We show that $\omega_B$ or $\omega_{\bar B}$, the squared baryon or antibaryon number fluctuation per baryon or antibaryon, is a possible signature for the quark-gluon plasma that is expected to be created in relativistic heavy ion collisions, as it is a
B. Andersson, C. M. Ko, C.M. Ko, D. Kharzeev, E.V. Shuryak, G. Baym, G.C. Rossi, G.C. Rossi, G.F. Bertsch, H. Heiselberg, J. Cleymans, J. Rafelski, J. Rafelski, M. Asakawa, M. Asakawa, M. Asakawa, M. Stephanov, S. Gavin, S. Jeon, S.E. Vance, T. Matsui, X.-N. Wang, Z.W. Lin, Zi-wei Lin   +23 more
core   +2 more sources

Baryon Number Conservation and Statistical Production of Antibaryons [PDF]

, 2000
The statistical production of antibaryons is considered within the canonical ensemble formulation. We demonstrate that the antibaryon suppression in small systems due to the exact baryon number conservation is rather different in the baryon-free (B=0 ...
Becattini, Becattini, Becattini, Cleymans, Cleymans, Fermi, Gaździcki, Gaździcki, Keränen, Landau, Marek Gaździcki, Mark I Gorenstein, Pomeranchuk, Rafelski, Redlich, Walter Greiner   +15 more
core   +3 more sources

Dependence of net-hyperon production at mid-rapidity on beam energy and its implication on baryon number carrier [PDF]

EPJ Web of Conferences
The conventional picture of baryon number is that each valence quark inside a baryon carries 1/3 unit of baryon number. However, an alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries 1 ...
Tsang Chun Yuen
doaj   +1 more source