Charmonium Production in 800 GeV/c p-Si Interactions

1997 ◽  
Vol 12 (22) ◽  
pp. 3847-3855
Author(s):  
Karla Hagan
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Fixed Target ◽  
Charmonium Production

Charmonium results are presented from Fermilab Experiment 771, proton-silicon interactions at [Formula: see text] with a fixed target spectrometer and dimuon trigger. Total and differential cross sections for J/ψ and ψ(2S) will be discussed, as well as a preliminary result on χ production.

NuTeV Structure Function Measurement

2005 ◽  
Vol 20 (16) ◽  
pp. 3759-3761 ◽  
Author(s):  
◽  
M. Tzanov ◽  
T. Adams ◽  
A. Alton ◽  
S. Avvakumov ◽  
...  
Keyword(s):  
Structure Function ◽  
Cross Sections ◽  
Differential Cross ◽  
Charged Current ◽  
Differential Cross Sections ◽  
Neutrino Detector ◽  
Fixed Target ◽  
Function Measurement ◽  
Current Events ◽  
The Difference

The NuTeV experiment obtained high statistics samples of neutrino and antineutrino charged current events during the 1996-1997 Fermilab fixed target run. The experiment combines sign-selected neutrino and antineutrino beams and the upgraded CCFR iron-scintillator neutrino detector. A precision continuous calibration beam was used to determine the muon and hadron energy scales to a precision of 0.7% and 0.43% respectively. The structure functions F2(x, Q2) and xF3(x, Q2) obtained by fitting the y-dependence of the sum and the difference of the ν and [Formula: see text] differential cross sections are presented.

scholarly journals Charmonium Production in Fermilab E789

1997 ◽  
Vol 12 (22) ◽  
pp. 3827-3836 ◽  
Author(s):  
Daniel M. Kaplan
Keyword(s):  
Perturbative Qcd ◽  
Cross Sections ◽  
Differential Cross ◽  
Production Cross ◽  
Differential Cross Sections ◽  
Color Singlet ◽  
Charmonium Production ◽  
Detailed Understanding ◽  
Color Octet ◽  
Beauty Production

Using a sample of > 105 J/ψ → μ+ μ- decays, Fermilab experiment 789 has studied production of J/ψ and ψ′ in 800 GeV proton-nucleon collisions. Differential cross sections and nuclear dependences have been measured for charmonium as well as for charm and beauty production. While charm and beauty production are consistent with perturbative QCD calculations, charmonium cross sections exceed the predictions of the color-singlet model by large factors, suggesting that additional mechanisms (such as color-octet production) may play important roles. Nuclear dependences of production cross sections may offer a new tool for the detailed understanding of charmonium production.

Charmonium Production with 300 GeV/c π+, π-, p and $\bar{p}$ Beams

1997 ◽  
Vol 12 (22) ◽  
pp. 3837-3846
Author(s):  
Michael Arenton
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections ◽  
Direct Production ◽  
Charmonium Production ◽  
Charmonium States

Results of an experiment measuring the production of charmonium states with 300 GeV/c π+, π-, p and [Formula: see text] beams on a Li target are presented. Total and differential cross sections for production of J/ψ, ψ′ and χ states are presented. The separation of the χ signal into the χ1 and χ2 states is discussed. The fraction of J/ψ's that result from direct production is derived.

Differential cross sections in antiproton- and proton-helium collisions

1999 ◽  
Vol 32 (4) ◽  
pp. L73-L79 ◽  
Author(s):  
Kh Khayyat ◽  
T Weber ◽  
R Dörner ◽  
M Achler ◽  
V Mergel ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Differential Cross Sections

scholarly journals Measurements of the differential cross sections of the production of Z + jets and γ + jets and of Z boson emission collinear with a jet in pp collisions at $$ \sqrt{s} $$ = 13 TeV

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
◽  
A. M. Sirunyan ◽  
A. Tumasyan ◽  
W. Adam ◽  
F. Ambrogi ◽  
...  
Keyword(s):  
Cross Sections ◽  
Differential Cross ◽  
Z Boson ◽  
Center Of Mass ◽  
Z Bosons ◽  
Differential Cross Sections ◽  
Pp Collisions ◽  
Center Of Mass Energy ◽  
Cms Experiment ◽  
Theoretical Predictions

Abstract Measurements of the differential cross sections of Z + jets and γ + jets production, and their ratio, are presented as a function of the boson transverse momentum. Measurements are also presented of the angular distribution between the Z boson and the closest jet. The analysis is based on pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1 recorded by the CMS experiment at the LHC. The results, corrected for detector effects, are compared with various theoretical predictions. In general, the predictions at higher orders in perturbation theory show better agreement with the measurements. This work provides the first measurement of the ratio of the differential cross sections of Z + jets and γ + jets production at 13 TeV, as well as the first direct measurement of Z bosons emitted collinearly with a jet.

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