Production of high-invariant-mass charmonium pairs in proton–proton interaction

2015 ◽  
Vol 78 (8) ◽  
pp. 963-967
Author(s):  
A. A. Novoselov
Keyword(s):  
Invariant Mass ◽  
Proton Proton ◽  
Proton Interaction

scholarly journals Theoretical Study on Proton Diffusivity in Y-Doped BaZrO3 with Realistic Dopant Configurations

2020 ◽  
Author(s):  
Takeo Fujii ◽  
Kazuaki Toyoura ◽  
Tetsuya Uda ◽  
Shusuke Kasamatsu
Keyword(s):  
First Principles ◽  
Theoretical Study ◽  
Site Effect ◽  
Barium Zirconate ◽  
Proton Proton ◽  
Potential Wells ◽  
Proton Interaction ◽  
Master Equation Approach ◽  
Replica Exchange Monte Carlo ◽  
Random Configuration

We theoretically revisit the proton diffusivity in yttrium-doped barium zirconate (Y-doped BaZrO<sub>3</sub>) with realistic dopant configurations under processing conditions. In a recent study employing the replica exchange Monte Carlo method, the equilibrium Y configurations at typical sintering temperatures were shown to deviate from the random configuration assumed in earlier theoretical studies. In the present study, we took this observation into account and evaluated the effect of the Y configuration on the proton diffusivity. Using the master equation approach based on local diffusion barriers calculated from first principles, the proton diffusivities under realistic Y configurations were estimated to be higher than those in the random configuration. This is explained by the fact that realistic Y configurations have fewer trap sites with deep potential wells compared to the random configuration due to the isolation trend of Y dopants. In addition, the effects of proton-proton interaction and the abundance of preferential conduction pathways are discussed; it is found that both are relatively minor factors compared to the trap site effect in determining the dependence of the proton diffusivity on the Y configurations.<br>

scholarly journals Improved Event Mixing for Resonance Yield Extraction

Proceedings ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 26
Author(s):  
Adrian Fereydon Nassirpour
Keyword(s):  
Invariant Mass ◽  
New Method ◽  
Combinatorial Background ◽  
Proton Proton ◽  
Proton Collisions ◽  
Particle Pairs ◽  
Proton Proton Collisions

Resonance particles, such as the K*(892) meson, are reconstructed from the invariant mass (M i n v ) distribution of possible particle pairs. To extract the yield with the highest precision, the combinatorial background must be determined as precisely as possible. An event-mixed M i n v distribution is often used to describe the combinatorial background. However, this distribution will not contain the mini-jet-like structures present inside an event. This analysis introduces a new re-weighing scheme, where two M i n v distributions of like-sign particles in the same-event and in mixed-events are used to correct the mixed-event background estimate for the mini-jet-like structure. Using PYTHIA 8.2 generated proton-proton collisions at s NN = 5.02 TeV, it is shown that the new method can be used to more accurately describe the combinatorial background.

scholarly journals Evidence of Short-Range Repulsive Spin-Orbit Components in the Proton-Proton Interaction

1987 ◽  
Vol 77 (3) ◽  
pp. 497-501 ◽  
Author(s):  
M. Matsuda ◽  
H. Suemitsu ◽  
M. Yonezawa
Keyword(s):  
Short Range ◽  
Spin Orbit ◽  
Proton Proton ◽  
Proton Interaction

Missing-mass dependence of some correlation parameters in proton-proton interaction at 28.5 GeV/c

1974 ◽  
Vol 9 (11) ◽  
pp. 432-434 ◽  
Author(s):  
F. Ochiai ◽  
Y. Homma ◽  
O. Kusumoto ◽  
H. Okabe ◽  
M. Teranaka ◽  
...  
Keyword(s):  
Mass Dependence ◽  
Missing Mass ◽  
Proton Proton ◽  
Proton Interaction ◽  
Correlation Parameters

Investigation of the proton-proton interaction at high energies

1956 ◽  
Vol 3 (S1) ◽  
pp. 119-132 ◽  
Author(s):  
M. G. Meščerjakov ◽  
N. P. Bogačev ◽  
B. S. Neganov
Keyword(s):  
Proton Proton ◽  
High Energies ◽  
Proton Interaction
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