Search for the doubly charmed baryon Ωcc

A search for the doubly charmed baryon Ω cc + with the decay mode Ω cc + → Ξ c + K − π + is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb −1 . No significant si...

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Veröffentlicht in:	Science China. Physics, mechanics & astronomy mechanics & astronomy, 2021-10, Vol.64 (10), p.101062, Article 101062
Hauptverfasser:	Alexander, M., An, L., Basels, J. M., Belous, K., Bezshyiko, I., Boldyrev, A., Borsuk, J. T., Braun, S., Butter, J. S., Calvo Gomez, M., Camargo Magalhaes, P., Capelli, S., Chen, S., Chobanova, V., Chulikov, V., Cid Vidal, X., Cojocariu, L., Crkovská, J., Cruz Torres, M., D’Ambrosio, C., Danilina, A., De Cian, M., De Simone, D., Delaney, B., Dieste Maronas, L., Durham, J. M., Dzyuba, A., Ek-In, S., Eklund, L., Escher, S., Falabella, A., Fontanelli, F., Garcia Rosales, F. A., Gligorov, V. V., Gorbounov, P., Govorkova, E., Greeven, L. M., Gruberg Cazon, B. R., Hamilton, P. M., Hansmann-Menzemer, S., Hu, W., Idzik, M., Johnson, D., Klaver, S., Kondybayeva, A., Krawczyk, R. D., Kreps, M., Krzemien, W., Kudryavtsev, V., Lane, J. J., Lanfranchi, G., Lee, S. H., Li, L., Liu, G., Mackowiak, P., Maddrell-Mander, S., Maev, O., Marchand, J. F., McNulty, R., Meloni, S., Minotti, A., Müller, D., Müller, K., Nguyen, T. D., Pappagallo, M., Pappenheimer, C., Petridis, K., Petrolini, A., Pica, L., Pietrzyk, B., Pili, M., Plews, J., Polyakov, I., Pugatch, V., Pullen, H., Rachwal, B., Ramos Pernas, M., Rangel, M. S., Reboud, M., Redi, F., Rodrigues, A. B., Romero Vidal, A., Sazak, H., Serra, N., Shields, E. B., Smallwood, J. C., Souza De Almeida, F. L., Steinkamp, O., Szymanski, M., Trippl, C., Vagner, A., Vieira, D., Viemann, H., Villa, A., Vincent, P., Xiao, D., Xu, J., Yu, J., Zou, Q., Zucchelli, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Baryons Candidates Charm (particle physics) charmed baryons charmed quarks Classical and Continuum Physics Collaboration Decay experimental tests Hypotheses Large Hadron Collider limits on production of particles Luminosity Observations and Techniques Physics Physics and Astronomy Protons Quarks Sensors Software Transverse momentum
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Zusammenfassung:	A search for the doubly charmed baryon Ω cc + with the decay mode Ω cc + → Ξ c + K − π + is performed using proton-proton collision data at a centre-of-mass energy of 13 TeV collected by the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity of 5.4 fb −1 . No significant signal is observed within the invariant mass range of 3.6 to 4.0GeV/ c 2 . Upper limits are set on the ratio R of the production cross-section times the total branching fraction of the Ω cc + → Ξ c + K − π + decay with respect to the Ξ c c + + → Λ c + K − π + π + decay. Upper limits at 95% credibility level for R in the range 0.005 to 0.11 are obtained for different hypotheses on the Ω cc + mass and lifetime in the rapidity range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/ c .
ISSN:	1674-7348 1869-1927 1869-1927
DOI:	10.1007/s11433-021-1742-7