Results 31 to 40 of about 2,821,806 (233)

Observation of e + e − → ηψ(2S) at center-of-mass energies from 4.236 to 4.600 GeV

open access: yesJournal of High Energy Physics, 2021
Using a total of 5.25 fb −1 of e + e − collision data with center-of-mass energies from 4.236 to 4.600 GeV, we report the first observation of the process e + e − → ηψ(2S) with a statistical significance of 4.9 standard deviations.
The BESIII collaboration   +517 more
doaj   +1 more source

Cross section measurements of the processes e + e − → ωπ 0 and ωη at center-of-mass energies between 3.773 and 4.701 GeV

open access: yesJournal of High Energy Physics, 2022
The Born cross sections of the processes e + e − → ωπ 0 and e + e − → ωη are measured at center-of-mass energies between 3.773 and 4.701 GeV using a total integrated luminosity of 22.7 fb −1 collected with the BESIII detector operating at the BEPCII ...
The BESIII collaboration   +547 more
doaj   +1 more source

The canonical partition function for relativistic hadron gases

open access: yes, 2009
Particle production in high-energy collisions is often addressed within the framework of the thermal (statistical) model. We present a method to calculate the canonical partition function for the hadron resonance gas with exact conservation of the baryon
A. Andronic   +31 more
core   +1 more source

Probing the Phase Boundary between Hadronic Matter and the Quark-Gluon-Plasma in Relativistic Heavy Ion Collisions [PDF]

open access: yes, 1996
We discuss recent data on particle production with emphasis on the degree of thermal and chemical equilibration achieved. The data are interpreted in terms of a resonance gas model.
Braun-Munzinger, P., Stachel, J.
core   +3 more sources

Nucleon resonance production in $K^+N$ interactions [PDF]

open access: yes, 2013
In this work, we discuss the possibility of studying nucleon resonances in the $K^+N$ interactions. Based on our model calculations, it is found that the hyperon exchange plays an important role for the excitation of nucleon resonances in the $K^+N$ interactions.
arxiv   +1 more source

Observation of e + e − → π 0 π 0 ψ 2(3823)

open access: yesJournal of High Energy Physics, 2023
Using a data sample corresponding to an integrated luminosity of 11.3 fb −1 collected at center-of-mass energies from 4.23 to 4.70 GeV with the BESIII detector, we observe the process e + e − → π 0 π 0 ψ 2(3823) for the first time with a statistical ...
The BESIII collaboration   +576 more
doaj   +1 more source

Heavy resonance production in high energy nuclear collisions [PDF]

open access: yes, 1994
We estimate freezeout conditions for $s$, $c$, and $b$ quarks in high energy nuclear collisions. Freezeout is due either to loss of thermal contact, or to particles ``wandering'' out of the region of hot matter.
A. Capella   +20 more
core   +2 more sources

Parametric Resonance in a Vibrating Cavity

open access: yes, 2003
We present the study of parametric resonance in a one-dimensional cavity based on the analysis of classical optical paths. The recursive formulas for field energy are given. We separate the mechanism of particle production and the resonance amplification
Arnold   +17 more
core   +1 more source

Energy dependence of particle ratio fluctuations in central Pb+Pb collisions from $\sqrt{s_{_{NN}}} =$~6.3 to 17.3 GeV [PDF]

open access: yes, 2008
We present measurements of the energy dependence of event-by-event fluctuations in the K/pi and (p + \bar{p})/pi multiplicity ratios in heavy ion collisions at the CERN SPS.
A. D. Panagiotou   +91 more
core   +2 more sources

Calculation of Particle Production by Nambu Goldstone Bosons with Application to Inflation Reheating and Baryogenesis

open access: yes, 1994
A semiclassical calculation of particle production by a scalar field in a potential is performed. We focus on the particular case of production of fermions by a Nambu-Goldstone boson $\theta$.
A. Albrecht   +19 more
core   +1 more source

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