Charged particle multiplicity in π−–nucleus interactions at 50 GeV/c in nuclear emulsion

1979 ◽  
Vol 57 (10) ◽  
pp. 1672-1675 ◽  
Author(s):  
A. Mozumder ◽  
D. P. Goyal ◽  
P. K. Sengupta ◽  
S. Singh
Keyword(s):  
Charged Particle ◽  
Nuclear Emulsion ◽  
Mass Number ◽  
Experimental Results ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity

Experimental results on charged particle multiplicity of the interactions of 50 GeV/c negative pions with emulsion nuclei are presented. The values of [Formula: see text], [Formula: see text], and D are found to be 8.35 ± 0.17, 7.11 ± 0.25, and 4.75 ± 0.08 respectively. The results of π−–emulsion interactions are compared with those of p–emulsion interactions. The dependence of the parameter RA on mass number A has been examined and compared with the existing models of hadron–nucleus interactions.

Charged particle multiplicity in 400 GeV/c p-nucleus interactions in nuclear emulsion

1977 ◽  
Vol 131 (1) ◽  
pp. 61-71 ◽  
Author(s):  
M.M. Aggarwal ◽  
J.M. Kohli ◽  
I.S. Mittra ◽  
J.B. Singh ◽  
P.M. Sood ◽  
...  
Keyword(s):  
Charged Particle ◽  
Nuclear Emulsion ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity

CLUSTER SIZE DEPENDENCE ON RELATIVISTIC CHARGED PARTICLE MULTIPLICITY IN NUCLEUS–NUCLEUS COLLISIONS

2005 ◽  
Vol 14 (04) ◽  
pp. 569-577 ◽  
Author(s):  
N. AHMAD ◽  
M. M. KHAN ◽  
SHAKEEL AHMAD ◽  
M. ZAFAR ◽  
M. IRFAN
Keyword(s):  
Charged Particle ◽  
Cluster Size ◽  
Relative Velocity ◽  
Nuclear Emulsion ◽  
Size Dependence ◽  
Charged Particles ◽  
Projectile Energy ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Relativistic Charged Particle

Dependence of cluster size on relativistic charged particle multiplicity is examined by analyzing experimental data involving 530 and 283 interactions with nh≥0 caused by 4.5 A and 14.5 A GeV/c28 Si –beams in nuclear emulsion. The results reveal that the maximum number of charged particles constituting a cluster is four for the collisions having ns≥10, where ns is the number of relativistic charged particles produced in interactions with relative velocity β≥0.7. However, this number is found to be three for the interactions having ns≤9. Results also show that the cluster size is essentially insensitive to the projectile energy.

scholarly journals Multiplicity dependence of (multi-)strange hadron production in proton-proton collisions at $$\sqrt{s}$$ = 13 TeV

2020 ◽  
Vol 80 (2) ◽  
Author(s):  
S. Acharya ◽  
◽  
D. Adamová ◽  
S. P. Adhya ◽  
A. Adler ◽  
...  
Keyword(s):  
Charged Particle ◽  
Charged Particles ◽  
General Purpose ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Production Rates ◽  
Proton Proton ◽  
Proton Collisions ◽  
Strange Hadron ◽  
Proton Proton Collisions

Abstract The production rates and the transverse momentum distribution of strange hadrons at mid-rapidity ($$\left| y\right| < 0.5$$y<0.5) are measured in proton-proton collisions at $$\sqrt{s}$$s = 13 TeV as a function of the charged particle multiplicity, using the ALICE detector at the LHC. The production rates of $$\mathrm{K}^{0}_{S}$$KS0, $$\Lambda $$Λ, $$\Xi $$Ξ, and $$\Omega $$Ω increase with the multiplicity faster than what is reported for inclusive charged particles. The increase is found to be more pronounced for hadrons with a larger strangeness content. Possible auto-correlations between the charged particles and the strange hadrons are evaluated by measuring the event-activity with charged particle multiplicity estimators covering different pseudorapidity regions. When comparing to lower energy results, the yields of strange hadrons are found to depend only on the mid-rapidity charged particle multiplicity. Several features of the data are reproduced qualitatively by general purpose QCD Monte Carlo models that take into account the effect of densely-packed QCD strings in high multiplicity collisions. However, none of the tested models reproduce the data quantitatively. This work corroborates and extends the ALICE findings on strangeness production in proton-proton collisions at 7 TeV.

scholarly journals Study of charged-particle multiplicity fluctuations in pp collisions with Monte Carlo event generators at the LHC

2020 ◽  
Vol 29 (09) ◽  
pp. 2050074
Author(s):  
E. Shokr ◽  
A. H. El-Farrash ◽  
A. De Roeck ◽  
M. A. Mahmoud
Keyword(s):  
Charged Particle ◽  
Particle Production ◽  
Local Density ◽  
Particle Density ◽  
Hadron Collider ◽  
Center Of Mass ◽  
Monte Carlo Event ◽  
Particle Multiplicity ◽  
Charged Particle Multiplicity ◽  
Proton Proton

Proton–Proton ([Formula: see text]) collisions at the Large Hadron Collider (LHC) are simulated in order to study events with a high local density of charged particles produced in narrow pseudorapidty windows of [Formula: see text] = 0.1, 0.2, and 0.5. The [Formula: see text] collisions are generated at center of mass energies of [Formula: see text], [Formula: see text], [Formula: see text], and [Formula: see text] TeV, i.e., the energies at which the LHC has operated so far, using PYTHIA and HERWIG event generators. We have also studied the average of the maximum charged-particle density versus the event multiplicity for all events, using the different pseudorapidity windows. This study prepares for the multi-particle production background expected in a future search for anomalous high-density multiplicity fluctuations using the LHC data.

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