Study of excited Λ < inf > b < /inf > 0 states decaying to Λ < inf > b < /inf > 0 π + π − in proton-proton collisions at s=13TeV

Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Bergauer, T.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Frühwirth, R.; Jeitler, M.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Rad, N.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Waltenberger, W.; Wulz, C. E.; Zarucki, M.; Drugakov, V.; Mossolov, V.; Suarez Gonzalez, J.; Darwish, M. R.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Kello, T.; Lelek, A.; Pieters, M.; Rejeb Sfar, H.; Van Haevermaet, H.; Van Mechelen, P.; Van Putte, S.; Van Remortel, N.; Blekman, F.; Bols, E. S.; Chhibra, S. S.; D'Hondt, J.; De Clercq, J.; Lontkovskyi, D.; Lowette, S.; Marchesini, I.; Moortgat, S.; Python, Q.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Beghin, D.; Bilin, B.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Favart, L.; Grebenyuk, A.; Kalsi, A. K.; Moureaux, L.; Popov, A.; Postiau, N.; Starling, E.; Thomas, L.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Cornelis, T.; Dobur, D.; Khvastunov, I.; Niedziela, M.; Roskas, C.; Skovpen, K.; Tytgat, M.; Verbeke, W.; Vermassen, B.; Vit, M.; Bruno, G.; Caputo, C.; David, P.; Delaere, C.; Delcourt, M.; Giammanco, A.; Lemaitre, V.; Prisciandaro, J.; Saggio, A.; Vischia, P.; Zobec, J.; Alves, G. A.; Correia Silva, G.; Hensel, C.; Moraes, A.; Belchior Batista Das Chagas, E.; Carvalho, W.; Chinellato, J.; Coelho, E.; Da Costa, E. M.; Da Silveira, G. G.; De Jesus Damiao, D.

Study of excited Λ < inf > b < /inf > 0 states decaying to Λ < inf > b < /inf > 0 π + π − in proton-proton collisions at s=13TeV

Date

2020-04-10

Authors

Sirunyan, A. M.

Tumasyan, A.

Adam, W.

Ambrogi, F.

Bergauer, T.

Dragicevic, M.

Erö, J.

Escalante Del Valle, A.

Flechl, M.

Frühwirth, R.

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Abstract

A study of excited Λb0 baryons is reported, based on a data sample collected in 2016–2018 with the CMS detector at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of up to 140fb−1. The existence of four excited Λb0 states: Λb0(5912)0, Λb0(5920)0, Λb0(6146)0, and Λb0(6152)0 in the Λb0π+π− mass spectrum is confirmed, and their masses are measured. The Λb0π+π− mass distribution exhibits a broad excess of events in the region of 6040–6100 MeV, whose origin cannot be discerned with the present data.

Keywords

Beauty baryon, CMS, Experimental results, Flavor spectroscopy, Heavy baryon, Heavy flavor, Physics

Citation

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. v.803

URI

10.1016/j.physletb.2020.135345
https://www.sciencedirect.com/science/article/abs/pii/S0370269320301490
https://dspace.uohyd.ac.in/handle/1/10087

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Electronics Science and Technology - Publications

Full item page

Study of excited Λ < inf > b < /inf > < sup > 0 < /sup > states decaying to Λ < inf > b < /inf > < sup > 0 < /sup > π < sup > + < /sup > π < sup > − < /sup > in proton-proton collisions at s=13TeV

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