Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]]

doi:https://doi.org/10.1103/PhysRevD.50.4454

Title: Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]]

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Abstract

We determine the mass and width of the [rho][sup 0] meson by applying the [ital S]-matrix formalism to the reaction [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]] in the timelike region. We obtain [ital M][sub [rho]]=(757.5[plus minus]1.5) MeV and [Gamma][sub [rho]]=(142.5[plus minus]3.5) MeV, which are significantly smaller than the values quoted by the Particle Data Group. These values are almost independent of the specific form used to model the background.

Authors:

Bernicha, A ^[1]; Lopez Castro, G ^[2]; Pestieau, J ^[1]

Institut de Physique Theorique, Universite Catholique de Louvain, Chemin du Cyclotron 2, 1348 Louvain-la-Neuve (Belgium)
Departamento de Fisica, Cinvestav del Instituto Politecnico Nacional, Apdo. Postal 14-740, 07000 Mexico, D. F. (Mexico)

Publication Date:: 1994-10-01

OSTI Identifier:: 7007050

Resource Type:: Journal Article

Journal Name:: Physical Review, D (Particles Fields); (United States)

Additional Journal Information:: Journal Volume: 50:7; Journal ID: ISSN 0556-2821

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; RHO-770 MESONS; MASS; WIDTH; DECAY AMPLITUDES; ELECTRON-POSITRON INTERACTIONS; PIONS MINUS; PIONS PLUS; RESONANCE; S MATRIX; AMPLITUDES; BOSONS; DIMENSIONS; ELEMENTARY PARTICLES; HADRONS; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; MATRICES; MESONS; PARTICLE INTERACTIONS; PIONS; PSEUDOSCALAR MESONS; TRANSITION AMPLITUDES; VECTOR MESONS; 662420* - Properties of Mesons & Meson Resonances- (1992-); 662130 - General Theory of Particles & Fields- S-Matrix Theory, Relativistic Scattering Theory- (1992-); 662390 - Electromagnetic Processes & Properties- (1992-); 662310 - Weak & Electromagnetic Interactions of Leptons- (1992-)

Citation Formats


                    Bernicha, A, Lopez Castro, G, and Pestieau, J. Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]].  United States: N. p., 1994. 
        Web.  doi:10.1103/PhysRevD.50.4454.

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                    Bernicha, A, Lopez Castro, G, & Pestieau, J. Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]].  United States.  https://doi.org/10.1103/PhysRevD.50.4454

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                    Bernicha, A, Lopez Castro, G, and Pestieau, J. Sat .  
        "Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]]".  United States.  https://doi.org/10.1103/PhysRevD.50.4454.

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@article{osti_7007050,

  title        = {Mass and width of the [rho][sup 0] from an [ital S]-matrix approach to [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]]},

  author       = {Bernicha, A and Lopez Castro, G and Pestieau, J},

  abstractNote = {We determine the mass and width of the [rho][sup 0] meson by applying the [ital S]-matrix formalism to the reaction [ital e][sup +][ital e][sup [minus]][r arrow][pi][sup +][pi][sup [minus]] in the timelike region. We obtain [ital M][sub [rho]]=(757.5[plus minus]1.5) MeV and [Gamma][sub [rho]]=(142.5[plus minus]3.5) MeV, which are significantly smaller than the values quoted by the Particle Data Group. These values are almost independent of the specific form used to model the background.},

  doi          = {10.1103/PhysRevD.50.4454},

  url          = {https://www.osti.gov/biblio/7007050},
  journal      = {Physical Review, D (Particles Fields); (United States)},

  issn         = {0556-2821},

  number       = ,

  volume       = 50:7,

  place        = {United States},

  year         = {1994},

  month        = {10}

}

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