Radiative decays of light vector mesons

Ачасов, М. Н.; Baru, S.E.; Beloborodov, K.; Berdyugin, A. V.; Bozhenok, A. V.; Bukin, A. D.; Bukin, D.A.; Burdin, S.; Dimova, T.; Dolinsky, S.; Drozdetsky, A. A.; Dubrovin, M.; Gaponenko, I.; Голубев, В. Б.; Ivanchenko, V. N.; Koop, I. A.; Korol, A. A.; Koshuba, S. V.; Kukartsev, G.; Пахтусова, Е. В.; Polunin, A.A.; Popov, V.; Salnikov, A.; Serednyakov, S. I.; Shary, V.; Shatunov, Yu. M.; Sidorov, V.; Силагадзе, З. К.; Velikzhanin, Y.; Vasiljev, A. V.; Zakharov, A. S.

doi:10.1016/s0375-9474(00)00250-5

“…The SND Collaboration has also published new results on ηγ decays of vector mesons [53][54][55]; the branching fractions reported are in good correspondence with our predictions. However, as for the CMD-2 result reported above, the new SND data for Br(ω → ηγ) = (4.62 ± 0.71 ± 0.18) 10 −4 might indicate that our prediction for this mode is slightly too large.…”

Section: Radiative and Leptonic Decay Modessupporting

confidence: 83%

Isospin symmetry breaking within the HLS Model: A full ( $\rho, \omega, \phi$ ) mixing scheme

Benayoun

¹

,

O'Connell

²

2001

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We study the way isospin symmetry violation can be generated within the Hidden Local Symmetry (HLS) Model. We show that isospin symmetry breaking effects on pseudoscalar mesons naturally induces correspondingly effects within the physics of vector mesons, through kaon loops. In this way, one recovers all features traditionally expected from ρ−ω mixing and one finds support for the Orsay phase modelling of the e + e − → π + π − amplitude. We then examine an effective procedure which generates mixing in the whole ρ, ω, φ sector of the HLS Model. The corresponding model allows us to account for all two body decays of light mesons accessible to the HLS model in modulus and phase, leaving aside the ρ → ππ and K * → Kπ modes only, which raise a specific problem. Comparison with experimental data is performed and covers modulus and phase information ; this represents 26 physics quantities successfully described with very good fit quality within a constrained model which accounts for SU(3) breaking, nonet symmetry breaking in the pseudoscalar sector and, now, isospin symmetry breaking.

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“…The SND Collaboration has also published new results on ηγ decays of vector mesons [53][54][55]; the branching fractions reported are in good correspondence with our predictions. However, as for the CMD-2 result reported above, the new SND data for Br(ω → ηγ) = (4.62 ± 0.71 ± 0.18) 10 −4 might indicate that our prediction for this mode is slightly too large.…”

Section: Radiative and Leptonic Decay Modessupporting

confidence: 85%

Isospin Symmetry Breaking within the HLS Model: A Full (rho, omega, phi) Mixing Scheme

O'Connell¹

2001

0

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We study the way isospin symmetry violation can be generated within the Hidden Local Symmetry (HLS) Model. We show that isospin symmetry breaking effects on pseudoscalar mesons naturally induces correspondingly effects within the physics of vector mesons, through kaon loops. In this way, one recovers all features traditionally expected from ρ−ω mixing and one finds support for the Orsay phase modelling of the e + e − → π + π − amplitude. We then examine an effective procedure which generates mixing in the whole ρ, ω, φ sector of the HLS Model. The corresponding model allows us to account for all two body decays of light mesons accessible to the HLS model in modulus and phase, leaving aside the ρ → ππ and K * → Kπ modes only, which raise a specific problem. Comparison with experimental data is performed and covers modulus and phase information ; this represents 26 physics quantities successfully described with very good fit quality within a constrained model which accounts for SU(3) breaking, nonet symmetry breaking in the pseudoscalar sector and, now, isospin symmetry breaking.

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“…QCD has three types of charges known as color charge unlike Quantum Electrodynamics (QED) which has only one type of charge know as electric charge. Quarks are fundamental particles and carry fractional charges of + 2 3 e or - 1 3 e and also color charges. They come in six different flavors each having its own anti-particle known as antiquark.…”

Section: Introductionmentioning

confidence: 99%

High Statistics Analysis of All-Neutral Decays of Vector Mesons with the Radphi Experiment

Mokaya

¹

2018

0

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time of research. Through him I have come to learn a lot. My thesis committee guided me throughout the years. Thank you to Dr. Peter Schweitzer who always had his door open and answered any questions I had. Dr Jeffrey Schweitzer, thank you very much for all the life lessons you gave me you literally taught me not to be a quitter and through you I learned that any challenge I encounter is a problem waiting to be solved. Thanks to the members of my committee for their work reading this thesis and also to the Physics department at the University of Connecticut for creating a great atmosphere for learning and growth. I thank my fellow labmates in for the stimulating discussions and their willingness to help always , Alex, Brendan and James thank you. Nobody has been more important to me in my entire graduate school than my family members. I would like to thank the members of my family and whose love and guidance are with me in whatever I pursue. Most importantly I wish to thank my dad, for believing in me and constant encouragement and spiritual support throughout my life in general. Finally to my loving husband and daughter, Joshua and Jenise, thank you for being patient and for providing unending inspiration and support. Thank you! v

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Radiative decays of light vector mesons

Cited by 6 publications

References 3 publications

Isospin symmetry breaking within the HLS Model: A full ( $\rho, \omega, \phi$ ) mixing scheme

Isospin symmetry breaking within the HLS Model: A full ( $\rho, \omega, \phi$ ) mixing scheme

Isospin Symmetry Breaking within the HLS Model: A Full (rho, omega, phi) Mixing Scheme

High Statistics Analysis of All-Neutral Decays of Vector Mesons with the Radphi Experiment

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