Search for muoproduction of X(3872) at COMPASS and indication of a new state X˜(3872)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24510%2F18%3A00006311" target="_blank" >RIV/46747885:24510/18:00006311 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/18:00322543 RIV/68407700:21340/18:00322543

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S037026931830546X" target="_blank" >https://www.sciencedirect.com/science/article/pii/S037026931830546X</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˜(3872)

Popis výsledku v původním jazyce

© 2018 The Author We have searched for exclusive production of exotic charmonia in the reaction μ N→μ (J/&psi;π π−)π±N′ using COMPASS data collected with incoming muons of 160 GeV/c and 200 GeV/c momentum. In the J/&psi;π π− mass distribution we observe a signal with a statistical significance of 4.1 σ. Its mass and width are consistent with those of the X(3872). The shape of the π π− mass distribution from the observed decay into J/&psi;π π− 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;π π− is determined to be 71±28(stat)±39(syst) pb.

Název v anglickém jazyce

Search for muoproduction of X(3872) at COMPASS and indication of a new state X˜(3872)

Popis výsledku anglicky

© 2018 The Author We have searched for exclusive production of exotic charmonia in the reaction μ N→μ (J/&psi;π π−)π±N′ using COMPASS data collected with incoming muons of 160 GeV/c and 200 GeV/c momentum. In the J/&psi;π π− mass distribution we observe a signal with a statistical significance of 4.1 σ. Its mass and width are consistent with those of the X(3872). The shape of the π π− mass distribution from the observed decay into J/&psi;π π− 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;π π− is determined to be 71±28(stat)±39(syst) pb.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10304 - Nuclear physics

Projekt

<a href="/cs/project/LM2015058" target="_blank" >LM2015058: Výzkumná infrastruktura pro experimenty v CERN</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

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

783

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

334-340

Kód UT WoS článku

000441762300046

EID výsledku v databázi Scopus

2-s2.0-85049905172