A search for the doubly charmed baryon $\it{ \Omega}_{ cc}^{ +}$ with the decay mode $\it{ \Omega}_{ cc}^{ +}\to\it{ \Xi}_c^{ +}K^{ -}\pi^{ +}$ is performed using proton-proton collision data at a centre-of-mass energy of 13$\mathrm{ \,Te\kern -0.1em V}$ collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of $5.4\,\mathrm{ fb}^{ -1}$. No significant signal is observed within the invariant mass range of 3.6 to 4.0$\mathrm{ \,Ge\kern -0.1em V}/c^2$. Upper limits are set on the ratio $R$ of the production cross-section times the total branching fraction of the $\it{ \Omega}_{ cc}^{ +}\to\it{ \Xi}_c^{ +}K^{ -}\pi^{ +}$ decay with respect to the $\it{ \Xi}_{ cc}^{ ++}\to\it{ \Lambda}_c^{ +}K^{ -}\pi^{ +}\pi^{ +}$ decay. Upper limits at 95% credibility level for $R$ in the range $0.005$ to $0.11$ are obtained for different hypotheses on the $\it{ \Omega}_{ cc}^{ +}$ mass and lifetime in the rapidity range from 2.0 to 4.5 and transverse momentum range from 4 to 15$\mathrm{ \,Ge\kern -0.1em V}/c$.
Categories: hep-ex