scholarly journals THE RADIATIVE CORRECTIONS ACCOUNTING IN THE REACTION NEAR-THRESHOLD OF $J/\psi$ PHOTOPRODUCTION

2021 ◽  
Vol 55 (2 (255)) ◽  
pp. 141-147
Author(s):  
Davit A. Martiryan
Keyword(s):  
Lepton Pair ◽  
Electromagnetic Calorimeter ◽  
Radiative Corrections ◽  
Final State ◽  
Jefferson Lab ◽  
Psi Meson ◽  
Electrons And Positrons ◽  
State Selection ◽  
Selection Of ◽  
Near Threshold

The use of the method developed in the CLAS collaboration (Jefferson Lab, USA) of improving leptons momentum for more correct studies of final state selection of quasi-real photoproduction resulting from the reaction to near threshold photoproduction of the $J/\psi$ meson is described. The radiation photons that were detected in electromagnetic calorimeter were studied with electrons and positrons accompanied them in very narrow angles. The method of radiated photon selection of $e^+ e^- p^{\prime}(e^{\prime})$ reaction is given, where $e^+ e^-$ lepton pair is formed during the decay of $J/\psi$ meson.

Initial/final state selection of the spin polarization in electron tunneling across an epitaxial Fe∕GaAs(001) interface

2007 ◽  
Vol 91 (10) ◽  
pp. 102114 ◽  
Author(s):  
H. Kurebayashi ◽  
S. J. Steinmuller ◽  
J. B. Laloë ◽  
T. Trypiniotis ◽  
S. Easton ◽  
...  
Keyword(s):  
Spin Polarization ◽  
Electron Tunneling ◽  
Final State ◽  
State Selection ◽  
Selection Of

scholarly journals The Superiority of Quantum Strategy in 3-Player Prisoner’s Dilemma

Mathematics ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 1443
Author(s):  
Zhiyuan Dong ◽  
Ai-Guo Wu
Keyword(s):  
Game Theory ◽  
Prisoner's Dilemma ◽  
Prisoner’S Dilemma ◽  
Quantum Game ◽  
Final State ◽  
The Game Theory ◽  
Initial States ◽  
Quantum Strategy ◽  
Selection Of

In this paper, we extend the quantum game theory of Prisoner’s Dilemma to the N-player case. The final state of quantum game theory of N-player Prisoner’s Dilemma is derived, which can be used to investigate the payoff of each player. As demonstration, two cases (2-player and 3-player) are studied to illustrate the superiority of quantum strategy in the game theory. Specifically, the non-unique entanglement parameter is found to maximize the total payoff, which oscillates periodically. Finally, the optimal strategic set is proved to depend on the selection of initial states.

scholarly journals Top-induced contributions to H → $$ b\overline{b} $$ and H → $$ c\overline{c} $$ at $$ \mathcal{O}\left({\alpha}_s^3\right) $$

2020 ◽  
Vol 2020 (12) ◽  
Author(s):  
Roberto Mondini ◽  
Ulrich Schubert ◽  
Ciaran Williams
Keyword(s):  
Top Quark ◽  
Clustering Algorithm ◽  
Percent Level ◽  
Effective Field ◽  
Total Width ◽  
Monte Carlo Code ◽  
Final State ◽  
Fully Differential ◽  
State Selection ◽  
The Impact

Abstract In this paper we present a fully-differential calculation for the contributions to the partial widths H →$$ b\overline{b} $$ b b ¯ and H →$$ c\overline{c} $$ c c ¯ that are sensitive to the top quark Yukawa coupling yt to order $$ {\alpha}_s^3 $$ α s 3 . These contributions first enter at order $$ {\alpha}_s^2 $$ α s 2 through terms proportional to ytyq (q = b, c). At order $$ {\alpha}_s^3 $$ α s 3 corrections to the mixed terms are present as well as a new contribution proportional to $$ {y}_t^2 $$ y t 2 . Our results retain the mass of the final-state quarks throughout, while the top quark is integrated out resulting in an effective field theory (EFT). Our results are implemented into a Monte Carlo code allowing for the application of arbitrary final-state selection cuts. As an example we present differential distributions for observables in the Higgs boson rest frame using the Durham jet clustering algorithm. We find that the total impact of the top-induced (i.e. EFT) pieces is sensitive to the nature of the final-state cuts, particularly b-tagging and c-tagging requirements. For bottom quarks, the EFT pieces contribute to the total width (and differential distributions) at around the percent level. The impact is much bigger for the H →$$ c\overline{c} $$ c c ¯ channel, with effects as large as 15%. We show however that their impact can be significantly reduced by the application of jet-tagging selection cuts.

A cw dye laser for intracavity state selection of atomic and molecular gases

1984 ◽  
Vol 49 (5) ◽  
pp. 335-339 ◽  
Author(s):  
G. Weissmann ◽  
J. Ganz ◽  
A. Siegel ◽  
H. Waibel ◽  
H. Hotop
Keyword(s):  
Dye Laser ◽  
Molecular Gases ◽  
State Selection ◽  
Selection Of

scholarly journals NUMERICAL STUDY OF RADIATIVE CORRECTIONS IN THE LOW Q2 REGION AT HERA

1994 ◽  
Vol 09 (18) ◽  
pp. 3229-3244
Author(s):  
K. CHARCHULA ◽  
J. GAJEWSKI
Keyword(s):  
Cross Section ◽  
Numerical Study ◽  
Radiative Corrections ◽  
Hadronic Final State ◽  
Radiative Effects ◽  
Final State ◽  
Cross Section Measurement ◽  
Photoproduction Cross Section ◽  
Section Measurement

A detailed numerical study of radiative corrections in the low Q2 region at the HERA ep collider was performed. The specific case of the total photoproduction cross section measurement was taken as an example. Two different programs, TERAD91 and HER-ACLES4.2, were used to get an estimate of the size of radiative effects. It was found that radiative corrections can be quite large at some points of the space of leptonic (x, y) variables. However, after imposing experimentally feasible cuts on the radiated photon and the hadronic final state one gets corrections at the level of a few per cent.

The D-Band Exchange Splitting for Thin Gadolinium Overlayers

1989 ◽  
Vol 151 ◽  
Author(s):  
O. Lagraffe ◽  
P. A. Dowben ◽  
M. Onellion
Keyword(s):  
Synchrotron Radiation ◽  
Lower Bound ◽  
Exchange Splitting ◽  
Monolayer Films ◽  
Final State ◽  
Synchrotron Radiation Photoemission ◽  
Selection Of

ABSTRACTThin (0–6 monolayer) films of gadolinium on Cu(100) have been investigated using synchrotron radiation photoemission. From the definite selection of final state symmetries in photoemission, we have been able to determine a lower bound to the exchange splitting of the gadolinium 5d band. The gadolinium films on Cu(100) exhibit an exchange splitting that changes from approximately 1.1 eV to 0.6 eV as the overlayer thickness increases. The results for thicker films agree with the accepted values for the 5d exchange splitting of bulk gadolinium.

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