scholarly journals Geometry of ultraperipheral nuclear collisions

2019 ◽  
Vol 34 (12) ◽  
pp. 1950068 ◽  
Author(s):  
I. M. Dremin
Keyword(s):  
Cross Section ◽  
Relative Role ◽  
Heavy Nuclei ◽  
Interior Space ◽  
Strong Magnetic Fields ◽  
Exclusive Production ◽  
Nuclear Collisions ◽  
Two Photon ◽  
Role Of Light

It is advocated that geometry of the interaction region of two heavy nuclei colliding at large impact parameters is important for the relative role of light-by-light scattering and QCD-initiated processes. Exclusive production of resonances is possible by dense electromagnetic fields in the interior space between the nuclei. The cross-section of the two-photon processes is evaluated and some examples are considered. It is speculated that the exclusive production of [Formula: see text]-mesons by “two-photon” processes forbidden by the Landau–Yang rule may be allowed within strong magnetic fields due to odd number of photons becoming involved.

Author response for "Unraveling the relative role of light and water competition between lianas and trees in tropical forests"

2020 ◽  
Author(s):  
Félicien Meunier ◽  
Hans Verbeeck ◽  
Betsy Cowdery ◽  
Stefan A. Schnitzer ◽  
Chris M. Smith‐Martin ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Author Response ◽  
Relative Role ◽  
Water Competition ◽  
Role Of Light

Author response for "Unraveling the relative role of light and water competition between lianas and trees in tropical forests"

2020 ◽  
Author(s):  
Félicien Meunier ◽  
Hans Verbeeck ◽  
Betsy Cowdery ◽  
Stefan A. Schnitzer ◽  
Chris M. Smith‐Martin ◽  
...  
Keyword(s):  
Tropical Forests ◽  
Author Response ◽  
Relative Role ◽  
Water Competition ◽  
Role Of Light

scholarly journals FISSION CROSS SECTION IN THE SYNTHESIS OF THE 264Rf NUCLEUS VIA 26Mg+238U COMBINATION

2018 ◽  
Vol 127 (1A) ◽  
pp. 95
Author(s):  
Trần Viết Nhân Hào
Keyword(s):  
Mass Distribution ◽  
Cross Section ◽  
Compound Nucleus ◽  
Transfer Reaction ◽  
Fission Cross Section ◽  
Transfer Reactions ◽  
Heavy Nuclei ◽  
Fission Process ◽  
Rich Side

Our understanding of the fission mechanism has been still limited up to date, especially, for mass distribution of heavy nuclei or actinide ones. Since the heavy isotopes on the neutron-rich side of the nuclear chart cannot be accessed via capture reactions, it is thought that the mechanism can be studied via compound nuclei produced by multi-nucleon transfer reactions. In which, the fission process should be understood. In this report we mention the role of the transfer reaction <sup>26</sup>Mg + <sup>238</sup>U and an estimation of the cross section of the fission leds by the compound nucleus, <sup>264</sup>Rf.

scholarly journals A study of the process e+ + e−→ e+ + e− + p + p̄ by the two-photon mechanism γγ → pp̄ at high energies

2017 ◽  
Vol 32 (18) ◽  
pp. 1750104 ◽  
Author(s):  
Azad I. Ahmadov
Keyword(s):  
Experimental Data ◽  
Total Cross Section ◽  
Cross Section ◽  
Beam Energy ◽  
Center Of Mass ◽  
Proton Antiproton ◽  
Exclusive Production ◽  
Two Photon ◽  
High Energies ◽  
Energy Formula

In this paper, we consider the exclusive production of proton–antiproton pairs in the interaction between two quasireal photons in [Formula: see text] collision. The differential and total cross-section of the process [Formula: see text] at a beam energy of photons from 2.1 GeV to 4.5 GeV in the center-of-mass and for different values of [Formula: see text] is calculated. At energy [Formula: see text] the total cross-section process of the [Formula: see text] is calculated by the two-photon mechanism. The results are in satisfactory agreement with the experimental data.

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