scholarly journals Theoretical analysis of the γγ(*) → π0η process

2019 ◽  
Vol 199 ◽  
pp. 02005 ◽  
Author(s):  
Oleksandra Deineka ◽  
Igor Danilkin ◽  
Marc Vanderhaeghen
Keyword(s):  
Theoretical Analysis ◽  
Energy Range ◽  
Decay Width ◽  
Riemann Sheet ◽  
Two Photon ◽  
Photon Decay ◽  
Wave Resonance ◽  
Coupled Channel

The theoretical analysis of the γγ → π0η process is presented within the energy range up to 1.4 GeV. The S -wave resonance a0(980) is described involving the coupled channel dispersive framework and the D-wave a2(1320) is approximated as a Breit-Wigner resonance. For the a0(980) the pole is found on the IV Riemann sheet resulting in a two-photon decay width of Γa0 → γγ = 0.27(4) keV. The first dispersive prediction is provided for the single-virtual γγ*(Q2) → π0η process in the spacelike region up to Q2 = 1 GeV2.

MEASUREMENT OF THE TWO-PHOTON DECAY WIDTH OF THE INTERMEDIATE MASS HIGGS BOSONS IN A PHOTON-PHOTON COLLIDER

1998 ◽  
Vol 13 (14) ◽  
pp. 2411-2416 ◽  
Author(s):  
T. OHGAKI ◽  
T. TAKAHASHI ◽  
I. WATANABE ◽  
T. TAUCHI
Keyword(s):  
Higgs Boson ◽  
Decay Width ◽  
Statistical Error ◽  
Higgs Bosons ◽  
Partial Decay Width ◽  
Intermediate Mass ◽  
Two Photon ◽  
Photon Decay ◽  
Photon Collider ◽  
B Quark

The feasibility of a measurement of the partial decay width of the intermediate-mass Higgs boson(MH=120 GeV ) into two photons at a photon-photon collider is studied by a simulation. It is found that the two-photon decay width can be measured with the statistical error of 7.6% with the integrated luminosity of 10fb-1. We also discussed a possibility toward further improvement with sophisticated b-quark tagging technique.

scholarly journals Reply to “Comment on ‘Two-photon decay width of the sigma meson’ ”

2009 ◽  
Vol 79 (9) ◽  
Author(s):  
Francesco Giacosa ◽  
Thomas Gutsche ◽  
Valery E. Lyubovitskij
Keyword(s):  
Decay Width ◽  
Two Photon ◽  
Photon Decay ◽  
Sigma Meson

π0 DECAY AT CRITICAL TEMPERATURE

1992 ◽  
Vol 07 (27) ◽  
pp. 2493-2503 ◽  
Author(s):  
PIN-ZHEN BI ◽  
JOHANN RAFELSKI
Keyword(s):  
Decay Width ◽  
Decay Constant ◽  
Pion Mass ◽  
Quark Condensate ◽  
Chiral Symmetry Restoration ◽  
Pion Decay Constant ◽  
Two Photon ◽  
Photon Decay ◽  
Hot Matter ◽  
Influence Of Temperature On

The influence of temperature on the pion decay constant and the two-photon decay of π0 is considered near the chiral symmetry restoration point. We analyze how the mass and decay width relate to each other and find that the π0 decay width in hot matter is suppressed, provided that the pion mass vanishes at the critical point; it diverges if pion mass remains finite while quark condensate is dissolved at T c .

Two-photon decay width of the Higgs boson in left-right-symmetric theories

1989 ◽  
Vol 40 (5) ◽  
pp. 1722-1724 ◽  
Author(s):  
R. Martínez ◽  
M. A. Pérez ◽  
J. J. Toscano
Keyword(s):  
Higgs Boson ◽  
Decay Width ◽  
Two Photon ◽  
Photon Decay

Erratum: A Lattice Study of the Two-photon Decay Widths for Scalar and Pseudo-scalar Charmonium [Chinese Physics C Vol.44,No.8(2020)083108]

2022 ◽  
Author(s):  
Ying Chen ◽  
Ming Gong ◽  
Ning Li ◽  
Chuan 刘川 Liu ◽  
Yubin 刘玉斌 Liu ◽  
...  
Keyword(s):  
Decay Width ◽  
Two Photon ◽  
Photon Decay ◽  
Decay Widths ◽  
Pseudo Scalar

Abstract We have corrected the decay width for the two photon decay widths for scalar and pseudo-scalar Charmonium in [Chinese Physics C Vol.44,No.8(2020)083108]. The decay widths are now in better agreement with the experiment values.

scholarly journals Comment on “Two-photon decay width of the sigma meson”

2009 ◽  
Vol 79 (9) ◽  
Author(s):  
Eef van Beveren ◽  
Frieder Kleefeld ◽  
George Rupp ◽  
Michael D. Scadron
Keyword(s):  
Decay Width ◽  
Two Photon ◽  
Photon Decay ◽  
Sigma Meson

scholarly journals Two-photon decay width of the sigma meson

2008 ◽  
Vol 77 (3) ◽  
Author(s):  
Francesco Giacosa ◽  
Thomas Gutsche ◽  
Valery E. Lyubovitskij
Keyword(s):  
Decay Width ◽  
Two Photon ◽  
Photon Decay ◽  
Sigma Meson
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