Observation of a New Narrow Axial-Vector Meson alpha(1)(1420)
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F15%3A10318950" target="_blank" >RIV/00216208:11320/15:10318950 - isvavai.cz</a>
Alternative codes found
RIV/68081731:_____/15:00447002
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.115.082001" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.115.082001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.115.082001" target="_blank" >10.1103/PhysRevLett.115.082001</a>
Alternative languages
Result language
angličtina
Original language name
Observation of a New Narrow Axial-Vector Meson alpha(1)(1420)
Original language description
The COMPASS Collaboration at CERN has measured diffractive dissociation of 190 GeV/c pions into the pi(-) pi(-) pi(+) final state using a stationary hydrogen target. A partial- wave analysis (PWA) was performed in bins of 3 pi mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f(0)(980)pi channel with spin, parity and C-parity quantum numbers J(PC) = 1(++). We present a resonance- model study of a subset of thespin-density matrix selecting 3 pi states with J(PC) = 2(++) and 4(++) decaying into rho(770)pi and with J(PC) = 1(++) decaying into f(0)(980)pi. We identify a new a 1 meson with mass (1414(-13)(+15)) MeV/c(2) and width (153(-23)(+8)) MeV/c(2). Within the final states investigated in our analysis, we observe the new a(1)(1420) decaying only into f(0)(980)pi, suggesting its exotic nature.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BF - Elementary particle theory and high energy physics
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2015
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 Letters
ISSN
0031-9007
e-ISSN
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Volume of the periodical
115
Issue of the periodical within the volume
8
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
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UT code for WoS article
000359872600002
EID of the result in the Scopus database
2-s2.0-84940780129