ABSOLUTE PAIR PRODUCTION CROSS SECTION OF LEAD AT 2.76 MEV.

1956 ◽  
Vol 34 (11) ◽  
pp. 1126-1133 ◽  
Author(s):  
S. Standil ◽  
R. D. Moore
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Gamma Rays ◽  
Production Cross Section ◽  
Detection Efficiency ◽  
Production Cross ◽  
Separate Experiment ◽  
Annihilation Radiation ◽  
Coincidence Counting ◽  
Pair Production Cross Section

A value has been obtained for the absolute pair production cross section of lead for the 2.76 Mev. gamma rays of Na24. A collimated beam of these gamma rays was made to fall on a specially constructed target and the positrons produced in the target were detected by counting two-quanta annihilation events by means of two scintillation spectrometers in coincidence. The strength of the Na24 source was measured by a coincidence counting technique and the counter detection efficiency for annihilation radiation was measured with a calibrated Na22 source. The effect of absorption of the 0.511 Mev. annihilation radiation in the target was measured in a separate experiment. The value obtained for the cross section was 2.38 ± 0.62 barns.

scholarly journals W pair production cross-section and W branching fractions in e+e− interactions at 183 GeV

1999 ◽  
Vol 456 (2-4) ◽  
pp. 310-321 ◽  
Author(s):  
P Abreu ◽  
W Adam ◽  
T Adye ◽  
P Adzic ◽  
Z Albrecht ◽  
...  
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Production Cross ◽  
Branching Fractions ◽  
Pair Production Cross Section

MEASUREMENT OF THE TOP QUARK PAIR PRODUCTION CROSS SECTION IN LEPTON+JETS FINAL STATES AT DØ USING A MULTIVARIATE TECHNIQUE

2005 ◽  
Vol 20 (14) ◽  
pp. 3177-3179
Author(s):  
◽  
TOBIAS GOLLING
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Top Quark ◽  
Production Cross Section ◽  
Production Cross ◽  
Final States ◽  
Multivariate Technique ◽  
Text Production ◽  
Lepton Jets ◽  
Pair Production Cross Section

A measurement of the [Formula: see text] production cross-section at [Formula: see text] with the DØ detector at the Fermilab Tevatron, based on the application of a multivariate topological method is presented. The integrated luminosity corresponds to 143.9 pb-1 in the μ+jets and 141.2 pb-1 in the e+jets channel. The preliminary cross-section is measured to be [Formula: see text].

PROBING THE LEFT–RIGHT TWIN HIGGS MODEL VIA PROCESS $e^{+}e^{-}\rightarrow b\bar{b}$ AT THE ILC

2012 ◽  
Vol 27 (07) ◽  
pp. 1250024
Author(s):  
DAPENG YANG ◽  
BINGFANG YANG ◽  
BIN XU
Keyword(s):  
Pair Production ◽  
Cross Section ◽  
Production Cross Section ◽  
Linear Collider ◽  
Production Cross ◽  
Bottom Quark ◽  
International Linear Collider ◽  
Higgs Model ◽  
Tree Level ◽  
Pair Production Cross Section

In the framework of the Left–Right Twin Higgs model, we studied the bottom-quark pair production via e+e- collision at the International Linear Collider. We calculated the bottom-quark pair production cross-section at tree level and the relevant differential distributions. The relative correction of the production cross-section is significant and the result will be a sensitive probe of the Left–Right Twin Higgs model.

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