Light isovector resonances in π-p →π-π-π p at 190 GeV/c
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24510%2F18%3A00006372" target="_blank" >RIV/46747885:24510/18:00006372 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.092003" target="_blank" >https://journals.aps.org/prd/abstract/10.1103/PhysRevD.98.092003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/physrevd.98.092003" target="_blank" >10.1103/physrevd.98.092003</a>
Alternative languages
Result language
angličtina
Original language name
Light isovector resonances in π-p →π-π-π p at 190 GeV/c
Original language description
© 2018 authors. Published by the American Physical Society. We have performed the most comprehensive resonance-model fit of π-π-π states using the results of our previously published partial-wave analysis (PWA) of a large data set of diffractive-dissociation events from the reaction π- p→π-π-π precoil with a 190 GeV/c pion beam. The PWA results, which were obtained in 100 bins of three-pion mass, 0.5<m3π<2.5 GeV/c2, and simultaneously in 11 bins of the reduced four-momentum transfer squared, 0.1<t′<1.0 (GeV/c)2, are subjected to a resonance-model fit using Breit-Wigner amplitudes to simultaneously describe a subset of 14 selected waves using 11 isovector light-meson states with JPC=0- , 1 , 2 , 2- , 4 , and spin-exotic 1- quantum numbers. The model contains the well-known resonances π(1800), a1(1260), a2(1320), π2(1670), π2(1880), and a4(2040). In addition, it includes the disputed π1(1600), the excited states a1(1640), a2(1700), and π2(2005), as well as the resonancelike a1(1420). We measure the resonance parameters mass and width of these objects by combining the information from the PWA results obtained in the 11 t′ bins. We extract the relative branching fractions of the ρ(770)π and f2(1270)π decays of a2(1320) and a4(2040), where the former one is measured for the first time. In a novel approach, we extract the t′ dependence of the intensity of the resonances and of their phases. The t′ dependence of the intensities of most resonances differs distinctly from the t′ dependence of the nonresonant components. For the first time, we determine the t′ dependence of the phases of the production amplitudes and confirm that the production mechanism of the Pomeron exchange is common to all resonances. We have performed extensive systematic studies on the model dependence and correlations of the measured physical parameters.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0029
e-ISSN
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Volume of the periodical
98
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
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UT code for WoS article
000449295300003
EID of the result in the Scopus database
2-s2.0-85058095967