Decays of anti-B0s and anti-B0 mesons into J/ψ π+ π− π+ π− final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb^−1 collected with the LHCb detector. anti-B0(s) → J/ψ f1(1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f1(1285) mixing angle between strange and nonstrange components of its wave function in the q anti-q structure model is determined to be ±(24.0{−2.6}{+3.1}{−0.8}{+0.6})°. Implications on the possible tetraquark nature of the f1(1285) are discussed
Decays of [¯ over B][0 over s] and [¯ over B][superscript 0] mesons into J/ψ π[superscript +]π[super...
Decays of B̄s0 and B̄0 mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the LHC, ...
Decays of $\bar{B}^0_(s)$ and $\bar{B}^0$ mesons into $J/\psi \pi^+\pi^-\pi^+\pi^-$ final states, ...
Decays of anti-B0s and anti-B0 mesons into J/ψ π+ π− π+ π− final states, produced in pp collisions a...
Decays of B(s)(0) and B(0) mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the L...
Decays of B(s)(0) and B(0) mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the L...
Decays of ¯B0s and ¯B0 mesons into J/ψ π+π−π+π− final states, produced in pp collisions at the LHC, ...
decays and measurement of the f1(1285) mixing angle The LHCb collaboration† Decays of B0s and B 0 me...
Decays of Bˉ0(s) and Bˉ0 mesons into J/ψπ+π−π+π− final states, produced in pp collisions at the LHC,...
Decays of B̄s0 and B̄0 mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the LHC, ...
Decays of Bs and B0 mesons into J/\psi \pi +\pi -\pi +\pi - final states, produced in pp collisions ...
Decays of B\u304s0 and B\u3040 mesons into J/\u3c8 \u3c0+\u3c0-\u3c0+\u3c0- final states, produced i...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of [¯ over B][0 over s] and [¯ over B][superscript 0] mesons into J/ψ π[superscript +]π[super...
Decays of B̄s0 and B̄0 mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the LHC, ...
Decays of $\bar{B}^0_(s)$ and $\bar{B}^0$ mesons into $J/\psi \pi^+\pi^-\pi^+\pi^-$ final states, ...
Decays of anti-B0s and anti-B0 mesons into J/ψ π+ π− π+ π− final states, produced in pp collisions a...
Decays of B(s)(0) and B(0) mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the L...
Decays of B(s)(0) and B(0) mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the L...
Decays of ¯B0s and ¯B0 mesons into J/ψ π+π−π+π− final states, produced in pp collisions at the LHC, ...
decays and measurement of the f1(1285) mixing angle The LHCb collaboration† Decays of B0s and B 0 me...
Decays of Bˉ0(s) and Bˉ0 mesons into J/ψπ+π−π+π− final states, produced in pp collisions at the LHC,...
Decays of B̄s0 and B̄0 mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the LHC, ...
Decays of Bs and B0 mesons into J/\psi \pi +\pi -\pi +\pi - final states, produced in pp collisions ...
Decays of B\u304s0 and B\u3040 mesons into J/\u3c8 \u3c0+\u3c0-\u3c0+\u3c0- final states, produced i...
Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- final states, produced in pp collisions at...
Decays of [¯ over B][0 over s] and [¯ over B][superscript 0] mesons into J/ψ π[superscript +]π[super...
Decays of B̄s0 and B̄0 mesons into J/ψ π+π-π+π- final states, produced in pp collisions at the LHC, ...
Decays of $\bar{B}^0_(s)$ and $\bar{B}^0$ mesons into $J/\psi \pi^+\pi^-\pi^+\pi^-$ final states, ...