Observation of Increasing Charged Multiplicity as a Function of Transverse Momentum inp+p→π++MMat 28.5 GeV/c

1975 ◽  
Vol 34 (5) ◽  
pp. 294-296 ◽  
Author(s):  
E. W. Anderson ◽  
T. S. Clifford ◽  
G. P. Fisher ◽  
G. P. Larson ◽  
E. Lazarus ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Multiplicity

DESCRIPTION OF (PSEUDO-)RAPIDITY DENSITY AND TRANSVERSE MOMENTUM DISTRIBUTIONS IN A WIDE ENERGY RANGE $(\sqrt{s} = 22.4\hbox{--}7000~{\rm GeV})$

2012 ◽  
Vol 27 (09) ◽  
pp. 1250043 ◽  
Author(s):  
AKINORI OHSAWA ◽  
EDISON HIROYUKI SHIBUYA ◽  
MASANOBU TAMADA
Keyword(s):  
Transverse Momentum ◽  
Energy Dependence ◽  
Particle Production ◽  
Center Of Mass ◽  
Wide Energy Range ◽  
Charged Multiplicity ◽  
Mass System ◽  
Rapidity Density ◽  
Momentum Distributions ◽  
Multiple Particle Production

The rapidity density and transverse momentum distributions of produced particles in multiple particle production are formulated assuming that the produced particles are emitted isotropically from several emitting centers. The energy distribution of produced particles in the rest frames of respective emitting centers is that of the Tsallis statistics. The distribution of emitting centers is flat with slanting cuts at both shoulders on the rapidity axis in the center of mass system. The formulation includes six adjustable parameters, among which four are energy dependent and more important and are determined so that the transverse momentum and the (pseudo-)rapidity density distributions fit to the data at various energies. The energy dependences of the four parameters, determined empirically, reproduce quite well the energy dependence of the average transverse momentum, that of the pseudo-rapidity density at η* = 0 and that of the charged multiplicity. The energy dependence of the inelasticity is either increasing or decreasing from the assumed value of K = 0.5 at [Formula: see text], due to lack of experimental data at the most-forward rapidity region. The pseudo-rapidity density distribution at LHC energy [Formula: see text] expected by the present formulation is compared with those by the other models.

scholarly journals The production of prompt positrons at low transverse momentum increases with the square of the associated charged multiplicity

1987 ◽  
Vol 192 (3-4) ◽  
pp. 463-470 ◽  
Author(s):  
T. Åkesson ◽  
M.G. Albrow ◽  
S. Almehed ◽  
E. Anassontzis ◽  
R. Batley ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Multiplicity

Observation of Increasing Charged Multiplicity as a Function of Transverse Momentum in 28.5-GeV/cppInteractions

1973 ◽  
Vol 31 (22) ◽  
pp. 1371-1374 ◽  
Author(s):  
A. Ramanauskas ◽  
E. W. Anderson ◽  
G. P. Fisher ◽  
N. C. Hien ◽  
E. Lazarus ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Multiplicity

scholarly journals Charged Multiplicity Associated with Transverse Momentum of a Leading Proton in pp at 28.5 GEV/C

1973 ◽  
Author(s):  
A. Ramanuaukas ◽  
E. W. Anderson ◽  
G. P. Fisher ◽  
N. C. Hien ◽  
E. Lazarus ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Charged Multiplicity

HIGH TRANSVERSE MOMENTUM PROCESSES

1973 ◽  
Vol 34 (C1) ◽  
pp. C1-385-C1-399 ◽  
Author(s):  
J. D. BJORKEN
Keyword(s):  
Transverse Momentum ◽  
High Transverse Momentum

scholarly journals Search for new phenomena in final states with b-jets and missing transverse momentum in $$ \sqrt{\mathrm{s}} $$ = 13 TeV pp collisions with the ATLAS detector

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
G. Aad ◽  
◽  
B. Abbott ◽  
D. C. Abbott ◽  
A. Abed Abud ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Pair Production ◽  
Atlas Detector ◽  
Final States ◽  
Proton Proton ◽  
Missing Transverse Momentum ◽  
The Standard Model ◽  
Proton Data ◽  
Identification Techniques ◽  
New Phenomena

Abstract The results of a search for new phenomena in final states with b-jets and missing transverse momentum using 139 fb−1 of proton-proton data collected at a centre-of-mass energy $$ \sqrt{s} $$ s = 13 TeV by the ATLAS detector at the LHC are reported. The analysis targets final states produced by the decay of a pair-produced supersymmetric bottom squark into a bottom quark and a stable neutralino. The analysis also seeks evidence for models of pair production of dark matter particles produced through the decay of a generic scalar or pseudoscalar mediator state in association with a pair of bottom quarks, and models of pair production of scalar third-generation down-type leptoquarks. No significant excess of events over the Standard Model background expectation is observed in any of the signal regions considered by the analysis. Bottom squark masses below 1270 GeV are excluded at 95% confidence level if the neutralino is massless. In the case of nearly mass-degenerate bottom squarks and neutralinos, the use of dedicated secondary-vertex identification techniques permits the exclusion of bottom squarks with masses up to 660 GeV for mass splittings between the squark and the neutralino of 10 GeV. These limits extend substantially beyond the regions of parameter space excluded by similar ATLAS searches performed previously.

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