The first observation of exotic states with a new quark content c anti-c u anti-s decaying to the J/ψ K+ final state is reported with high significance from an amplitude analysis of the B+ → J/ψ ϕ K+ decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9 fb^−1 collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV. The most significant state, Zcs(4000)+, has a mass of 4003 ± 6{−14}{+4} MeV, a width of 131 ± 15 ± 26 MeV, and spin parity J^P = 1+, where the quoted uncertainties are statistical and systematic, respectively. A new 1+ X(4685) state decaying to the J/ψ ϕ final state is also observed with high significance. In addition, the four previously ...
The first observation of exotic states with a new quark content c ¯ c u ¯ s decaying to the...
The first full amplitude analysis of B+ -> J/psi phi K+ with J/psi -> mu(+)mu(-), phi -> K+K- decays...
International audienceThe first observation of exotic states with a new quark content cc¯us¯ decayin...
The first observation of exotic states with a new quark content c anti-c u anti-s decaying to the J/...
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content cc¯us¯ decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to the...
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content ccu¯ s¯ decaying to the J=ψKþ final ...
The first full amplitude analysis of B+→J/ψϕK+ with J/ψ→μ+μ−, ϕ→K+K− decays is performed with a data...
The first full amplitude analysis of B+\u2192J/\u3c8\u3c6K+ with J/\u3c8\u2192\u3bc+\u3bc-, \u3c6\u2...
: The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to t...
The first observation of exotic states with a new quark content c ¯ c u ¯ s decaying to the...
The first full amplitude analysis of B+ -> J/psi phi K+ with J/psi -> mu(+)mu(-), phi -> K+K- decays...
International audienceThe first observation of exotic states with a new quark content cc¯us¯ decayin...
The first observation of exotic states with a new quark content c anti-c u anti-s decaying to the J/...
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content cc¯us¯ decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to the...
The first observation of exotic states with a new quark content c¯cu¯s decaying to the J/ψK+ final s...
The first observation of exotic states with a new quark content ccu¯ s¯ decaying to the J=ψKþ final ...
The first full amplitude analysis of B+→J/ψϕK+ with J/ψ→μ+μ−, ϕ→K+K− decays is performed with a data...
The first full amplitude analysis of B+\u2192J/\u3c8\u3c6K+ with J/\u3c8\u2192\u3bc+\u3bc-, \u3c6\u2...
: The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to t...
The first observation of exotic states with a new quark content c ¯ c u ¯ s decaying to the...
The first full amplitude analysis of B+ -> J/psi phi K+ with J/psi -> mu(+)mu(-), phi -> K+K- decays...
International audienceThe first observation of exotic states with a new quark content cc¯us¯ decayin...