ϒ MEASUREMENT IN STAR

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2110-2115
Author(s):  
◽  
MAURO R. COSENTINO
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Decay Channel ◽  
Production Cross ◽  
Preliminary Results ◽  
Analysis Methods ◽  
Central Rapidity ◽  
Star Experiment

We present preliminary results of ϒ production in p + p collisions at [Formula: see text] at central rapidity. This measurement was performed at the STAR experiment through the ϒ → e+ e− decay channel. In this manuscript we describe the experimental details, from the development of a specially designed trigger setup to the analysis methods used to discriminate electrons from hadrons. The production cross-section obtained [Formula: see text] pb is compatible with our expectations based on pQCD calculations.

scholarly journals Erratum to: Higgs boson production cross-section measurements and their EFT interpretation in the $$4\ell $$ decay channel at $$\sqrt{s}=$$13 TeV with the ATLAS detector

2021 ◽  
Vol 81 (5) ◽  
Author(s):  
G. Aad ◽  
◽  
B. Abbott ◽  
D. C. Abbott ◽  
A. Abed Abud ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Cross Section ◽  
Production Cross Section ◽  
Decay Channel ◽  
Production Cross ◽  
Atlas Detector ◽  
Boson Production ◽  
Higgs Boson Production

A Correction to this paper has been published: https://doi.org/10.1140/epjc/s10052-020-8227-9

scholarly journals Search for Heavy Particles Decaying into Electron-Positron Pairs in $p{\bar p}$ Collisions

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 866-868
Author(s):  
◽  
Chyi-Chang Miao
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Z Boson ◽  
Production Cross ◽  
Model Parameters ◽  
Heavy Particles ◽  
Preliminary Results ◽  
Electron Positron ◽  
Upper Limits

We present preliminary results of searches for technibadrons (ρT,ωT), and Z′ particles, using their decay into e+e-. The search is based on 124.8 pb -1 of data collected by the DØ detector at the Tevatron during 1992-1996. In the absence of a signal we set 95% CL upper limits on the production cross section and decay into e+e- as a function of the mass of the decaying particle. For certain model parameters, we exclude the existence of degenerate ρT and ωT states with masses below 207 GeV/c2. We exclude a Z′ with mass below 670 GeV/c2, assuming that the Z′ has the same couplings as the Z boson.

scholarly journals Inclusive $$\text {J}/\psi $$ production at midrapidity in pp collisions at $$\sqrt{s} = 13$$ TeV

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
S. Acharya ◽  
D. Adamová ◽  
A. Adler ◽  
G. Aglieri Rinella ◽  
M. Agnello ◽  
...  
Keyword(s):  
Cross Section ◽  
Production Cross Section ◽  
Decay Channel ◽  
Production Cross ◽  
Hadron Collider ◽  
Center Of Mass ◽  
Electromagnetic Calorimeter ◽  
Minimum Bias ◽  
Pp Collisions ◽  
Evaporation Models

AbstractWe report on the inclusive $$\text {J}/\psi $$ J / ψ production cross section measured at the CERN Large Hadron Collider in proton–proton collisions at a center-of-mass energy $$\sqrt{s}~=~13$$ s = 13  TeV. The $$\text {J}/\psi $$ J / ψ mesons are reconstructed in the $$\text {e}^{+}\text {e}^{-}$$ e + e - decay channel and the measurements are performed at midrapidity ($$|y|<0.9$$ | y | < 0.9 ) in the transverse-momentum interval $$0<p_{\mathrm{T}} <40$$ 0 < p T < 40  GeV/$$c$$ c , using a minimum-bias data sample corresponding to an integrated luminosity $$L_{\text {int}} = 32.2~\text {nb}^{-1}$$ L int = 32.2 nb - 1 and an Electromagnetic Calorimeter triggered data sample with $$L_{\text {int}} = 8.3~\mathrm {pb}^{-1}$$ L int = 8.3 pb - 1 . The $$p_{\mathrm{T}}$$ p T -integrated $$\text {J}/\psi $$ J / ψ production cross section at midrapidity, computed using the minimum-bias data sample, is $$\text {d}\sigma /\text {d}y|_{y=0} = 8.97\pm 0.24~(\text {stat})\pm 0.48~(\text {syst})\pm 0.15~(\text {lumi})~\mu \text {b}$$ d σ / d y | y = 0 = 8.97 ± 0.24 ( stat ) ± 0.48 ( syst ) ± 0.15 ( lumi ) μ b . An approximate logarithmic dependence with the collision energy is suggested by these results and available world data, in agreement with model predictions. The integrated and $$p_{\mathrm{T}}$$ p T -differential measurements are compared with measurements in pp collisions at lower energies and with several recent phenomenological calculations based on the non-relativistic QCD and Color Evaporation models.

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