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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]]

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:
 [1];  [2];  [1]
  1. Institut de Physique Theorique, Universite Catholique de Louvain, Chemin du Cyclotron 2, 1348 Louvain-la-Neuve (Belgium)
  2. Departamento de Fisica, Cinvestav del Instituto Politecnico Nacional, Apdo. Postal 14-740, 07000 Mexico, D. F. (Mexico)
Publication Date:
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.
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
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.
@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}
}