Search for muoproduction of X(3872) at COMPASS and indication of a new state (X)over-tilde(3872)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10384183" target="_blank" >RIV/00216208:11320/18:10384183 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081731:_____/18:00494613

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2018.07.008" target="_blank" >https://doi.org/10.1016/j.physletb.2018.07.008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2018.07.008" target="_blank" >10.1016/j.physletb.2018.07.008</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Search for muoproduction of X(3872) at COMPASS and indication of a new state (X)over-tilde(3872)

Popis výsledku v původním jazyce

We have searched for exclusive production of exotic charmonia in the reaction mu N+ -&gt; mu(+)(J/psi pi(+)pi(-))pi N-+/-&apos; using COMPASS data collected with incoming muons of 160 GeV/c and 200 GeV/c momentum. In the J/psi pi(vertical bar)pi mass distribution we observe a signal with a statistical significance of 4.1 sigma. Its mass and width are consistent with those of the X(3872). The shape of the pi(+)pi(-) mass distribution from the observed decay into J/psi pi(+)pi(-) shows disagreement with previous observations for X(3872). The observed signal may be interpreted as a possible evidence of a new charmonium state. It could be associated with a neutral partner of X(3872) with C=-1 predicted by a tetraquark model. The product of cross section and branching fraction of the decay of the observed state into J/psi pi(+)pi(-) is determined to be 71 +/- 28(stat)+/- 39(syst) pb. (C) 2018 The Author. Published by Elsevier B.V.

Název v anglickém jazyce

Search for muoproduction of X(3872) at COMPASS and indication of a new state (X)over-tilde(3872)

Popis výsledku anglicky

We have searched for exclusive production of exotic charmonia in the reaction mu N+ -&gt; mu(+)(J/psi pi(+)pi(-))pi N-+/-&apos; using COMPASS data collected with incoming muons of 160 GeV/c and 200 GeV/c momentum. In the J/psi pi(vertical bar)pi mass distribution we observe a signal with a statistical significance of 4.1 sigma. Its mass and width are consistent with those of the X(3872). The shape of the pi(+)pi(-) mass distribution from the observed decay into J/psi pi(+)pi(-) shows disagreement with previous observations for X(3872). The observed signal may be interpreted as a possible evidence of a new charmonium state. It could be associated with a neutral partner of X(3872) with C=-1 predicted by a tetraquark model. The product of cross section and branching fraction of the decay of the observed state into J/psi pi(+)pi(-) is determined to be 71 +/- 28(stat)+/- 39(syst) pb. (C) 2018 The Author. Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

ISSN

0370-2693

e-ISSN

—

Svazek periodika

783

Číslo periodika v rámci svazku

2018

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

334-340

Kód UT WoS článku

000441762300046

EID výsledku v databázi Scopus

2-s2.0-85049905172