scholarly journals J/ψProduction versus Transverse Momentum and Rapidity inp+pCollisions ats=200  GeV

2007 ◽  
Vol 98 (23) ◽  
Author(s):  
A. Adare ◽  
S. Afanasiev ◽  
C. Aidala ◽  
N. N. Ajitanand ◽  
Y. Akiba ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
200 Gev

Measurement of the average transverse momentum and of the pion-emission volume in proton-nucleus and antiproton-nucleus reactions at 200 GeV

1984 ◽  
Vol 29 (3) ◽  
pp. 363-367 ◽  
Author(s):  
C. De Marzo ◽  
M. De Palma ◽  
A. Distante ◽  
C. Favuzzi ◽  
P. Lavopa ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Average Transverse Momentum ◽  
Pion Emission ◽  
200 Gev ◽  
Emission Volume

Production of light flavored charged hadron in pp collisions at 900 GeV with hadron production models

2019 ◽  
Vol 34 (13) ◽  
pp. 1950100 ◽  
Author(s):  
M. Ajaz ◽  
M. Tufail ◽  
Y. Ali
Keyword(s):  
Transverse Momentum ◽  
Entire Range ◽  
Star Collaboration ◽  
Hadron Production ◽  
Charged Hadron ◽  
Experimental Measurements ◽  
Average Transverse Momentum ◽  
Production Models ◽  
200 Gev ◽  
Small Rise

Differential yields of light flavored charged hadrons in [Formula: see text] collision at 0.9 TeV in the transverse momentum [Formula: see text] ranging from 0.1–2.5 GeV/c with pseudorapidity [Formula: see text] are presented here. The spectra obtained by Monte Carlo simulations with event generators — EPOS 1.99, EPOS-LHC, QGSJETII-04 and Sibyll2.3c — are compared with the ALICE measurements. For [Formula: see text] mesons, EPOS1.99, EPOS-LHC and QGSJETII-04 described the ALICE measurement very well almost in the entire [Formula: see text] range except QGSJETII-04 which underpredicts with [Formula: see text] below 0.4 GeV/c. The Sibyll2.3c model slightly overpredicts for [Formula: see text] GeV/c and underpredicts afterwards. For [Formula: see text] mesons, all models describe the experimental data qualitatively, except at high [Formula: see text], where the models slightly underpredict. The EPOS-LHC and QGSJETII-04 models, at low [Formula: see text], describe the distribution of the experimental measurements very well in both cases of protons and anti-protons, whereas the former underpredicts and the latter overpredicts at higher [Formula: see text]. The EPOS1.99 overpredicts at low [Formula: see text] below 1 GeV/c, whereas it reproduces the results well above it. Sibyll2.3c overpredicts the distribution over the entire range of [Formula: see text]. Models described the average transverse momentum [Formula: see text] of these hadron species as a function of their mass, showing small rise in the average [Formula: see text] with the mass of the particles. The same has been observed by the STAR collaboration with measurements in [Formula: see text] reactions at [Formula: see text] = 200 GeV and also in [Formula: see text] collisions at [Formula: see text] = 900 GeV.

pT spectra of charged hadrons in proton–proton collisions at s = 200 GeV

2019 ◽  
Vol 34 (19) ◽  
pp. 1950148 ◽  
Author(s):  
M. Ajaz ◽  
Maryam
Keyword(s):  
Transverse Momentum ◽  
Star Collaboration ◽  
Hadron Production ◽  
Proton Proton ◽  
Proton Collisions ◽  
Production Models ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra ◽  
Proton Proton Collisions

The transverse momentum spectra of [Formula: see text] mesons, protons and antiprotons produced in proton–proton collisions at 200 GeV with hadron production models are reported. Two tunes of EPOS (EPOS1.99 and EPOS-LHC), three tunes of QGSJET (QGSJETI, QGSJETII-03, QGSJETII-04), DPMJET and HIJING models are used to obtain the spectra. The results are compared with the measurements of STAR collaboration obtained at mid-rapidity of [Formula: see text] in [Formula: see text] range of [Formula: see text]. All models reproduce the ratios [Formula: see text] and [Formula: see text] at low [Formula: see text] but could not predict well at high [Formula: see text]. In addition, EPOS tunes and QGSJET tunes predict well the spectra of [Formula: see text] meson and the ratios [Formula: see text] and [Formula: see text] at low [Formula: see text]. The HIJING and the QGSJET (tune I only) could reproduce all the spectra and all the ratios at a satisfactory level of precision and were found good among the models considered in the current study at RHIC energy.

scholarly journals J/ψProduction versus Centrality, Transverse Momentum, andRapidity inAu+AuCollisions atsNN=200  GeV

2007 ◽  
Vol 98 (23) ◽  
Author(s):  
A. Adare ◽  
S. Afanasiev ◽  
C. Aidala ◽  
N. N. Ajitanand ◽  
Y. Akiba ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
200 Gev

scholarly journals Energy dependence of π±, p and p¯ transverse momentum spectra for Au+Au collisions at sNN=62.4 and 200 GeV

2007 ◽  
Vol 655 (3-4) ◽  
pp. 104-113 ◽  
Author(s):  
B.I. Abelev ◽  
M.M. Aggarwal ◽  
Z. Ahammed ◽  
B.D. Anderson ◽  
D. Arkhipkin ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Energy Dependence ◽  
Momentum Spectra ◽  
200 Gev ◽  
Transverse Momentum Spectra

scholarly journals 200-GeV proton-proton elastic scattering at high transverse momentum

1970 ◽  
Author(s):  
L. G. Ratner ◽  
/Argonne ◽  
A. D. Krisch ◽  
J. B. Roberts ◽  
K. M. Terwilliger ◽  
...  
Keyword(s):  
Elastic Scattering ◽  
Transverse Momentum ◽  
High Transverse Momentum ◽  
Proton Proton ◽  
Proton Elastic Scattering ◽  
200 Gev

scholarly journals Search for a scalar partner of the top quark in the all-hadronic $$t{\bar{t}}$$ plus missing transverse momentum final state at $$\sqrt{s}=13$$ TeV with the ATLAS detector

2020 ◽  
Vol 80 (8) ◽  
Author(s):  
G. Aad ◽  
◽  
B. Abbott ◽  
D. C. Abbott ◽  
A. Abed Abud ◽  
...  
Keyword(s):  
Transverse Momentum ◽  
Top Quark ◽  
Atlas Detector ◽  
Supersymmetric Model ◽  
Proton Collision ◽  
Third Generation ◽  
Final State ◽  
Top Squark ◽  
Missing Transverse Momentum ◽  
200 Gev

Abstract A search for direct pair production of scalar partners of the top quark (top squarks or scalar third-generation up-type leptoquarks) in the all-hadronic $$t{\bar{t}}$$tt¯ plus missing transverse momentum final state is presented. The analysis of 139 $$\hbox {fb}^{-1}$$fb-1 of $${\sqrt{s}=13}$$s=13 TeV proton–proton collision data collected using the ATLAS detector at the LHC yields no significant excess over the Standard Model background expectation. To interpret the results, a supersymmetric model is used where the top squark decays via $${\tilde{t}} \rightarrow t^{(*)} {\tilde{\chi }}^0_1$$t~→t(∗)χ~10, with $$t^{(*)}$$t(∗) denoting an on-shell (off-shell) top quark and $${\tilde{\chi }}^0_1$$χ~10 the lightest neutralino. Three specific event selections are optimised for the following scenarios. In the scenario where $$m_{{\tilde{t}}}> m_t+m_{{\tilde{\chi }}^0_1}$$mt~>mt+mχ~10, top squark masses are excluded in the range 400–1250 GeV for $${\tilde{\chi }}^0_1$$χ~10 masses below 200 GeV at 95% confidence level. In the situation where $$m_{{\tilde{t}}}\sim m_t+m_{{\tilde{\chi }}^0_1}$$mt~∼mt+mχ~10, top squark masses in the range 300–630 GeV are excluded, while in the case where $$m_{{\tilde{t}}}< m_W+m_b+m_{{\tilde{\chi }}^0_1}$$mt~<mW+mb+mχ~10 (with $$m_{{\tilde{t}}}-m_{{\tilde{\chi }}^0_1}\ge 5$$mt~-mχ~10≥5 GeV), considered for the first time in an ATLAS all-hadronic search, top squark masses in the range 300–660 GeV are excluded. Limits are also set for scalar third-generation up-type leptoquarks, excluding leptoquarks with masses below 1240 GeV when considering only leptoquark decays into a top quark and a neutrino.

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