scholarly journals Hadron tomography by generalized distribution amplitudes in the pion-pair production process γ*γ→π0π0 and gravitational form factors for pion

2018 ◽  
Vol 97 (1) ◽  
Author(s):  
S. Kumano ◽  
Qin-Tao Song ◽  
O. V. Teryaev
Keyword(s):  
Pair Production ◽  
Production Process ◽  
Form Factors ◽  
Pion Pair ◽  
Pair Production Process ◽  
Generalized Distribution

scholarly journals What Can We Learn about Leptoquarks at LEP200?

1997 ◽  
Vol 12 (23) ◽  
pp. 1719-1725 ◽  
Author(s):  
Michael A. Doncheski ◽  
Stephen Godfrey
Keyword(s):  
Pair Production ◽  
Production Process ◽  
Coupling Strength ◽  
First Generation ◽  
Kinematic Limit ◽  
Discovery Potential ◽  
Pair Production Process

We investigate the discovery potential for first generation leptoquarks at the LEP200 e+e- collider. We consider direct leptoquark searches using single leptoquark production via resolved photon contributions which offers a much higher kinematic limit than the more commonly considered leptoquark pair production process. Depending on the coupling strength of the leptoquark, search limits can be obtained to within a few GeV of [Formula: see text]. We also consider LQ limits that can be obtained from t-channel interferences effects in e+e-→ hadrons .

scholarly journals A Re-investigation to the Death Line of Radio Pulsars

2003 ◽  
Vol 214 ◽  
pp. 171-174
Author(s):  
G. J. Qiao ◽  
Y. Q. Xue ◽  
B. Zhang ◽  
R. X. Xu ◽  
F. F. Ye ◽  
...  
Keyword(s):  
Pair Production ◽  
Production Process ◽  
Compton Scattering ◽  
Radio Pulsars ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Vacuum Gap ◽  
Pair Production Process ◽  
Additional Assumptions

A new death line for radio pulsars is presented in this paper within the framework of vacuum gap and inverse Compton scattering (ICS) induced pair production process. The 8.5s period pulsar PSR J2144-3933 is located above the death line without any additional assumptions. An “appearance line” instead of the so-called “Hubble line”, is also presented in this paper. Both of those two lines fit observations well.

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