We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/psi pi(+)pi(-))pi N-+/-' 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 sec...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
Exotic charmonium-like states have been observed by various experiments over the last 15 years, but ...
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \right...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \right...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
Exotic charmonium-like states have been observed by various experiments over the last 15 years, but ...
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \right...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction mu N+ -> mu(+)(J/ps...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
We have searched for exclusive production of exotic charmonia in the reaction μ+N→μ+(J/ψπ+π−)π±N′ us...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \right...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
International audienceWe have searched for exclusive production of exotic charmonia in the reaction ...
Exotic charmonium-like states have been observed by various experiments over the last 15 years, but ...
We have observed exclusive production of the exotic $X(3872)$ hadron in the reaction $\mu^+~N \right...