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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

  • Czech description

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

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

  • 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

  • UT code for WoS article

    000359872600002

  • EID of the result in the Scopus database

    2-s2.0-84940780129