Study of excited Λb                      0 states decaying to Λb                      0π+π− in proton-proton collisions at s=13TeV

The CMS collaboration

doi:10.1016/j.physletb.2020.135345

Study of excited Λ_b ⁰ states decaying to Λ_b ⁰π⁺π⁻ in proton-proton collisions at s=13TeV

The CMS collaboration

Research output: Contribution to journal › Article › peer-review

Abstract

A study of excited Λ_b ⁰ 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 Λ_b ⁰ states: Λ_b ⁰(5912)⁰, Λ_b ⁰(5920)⁰, Λ_b ⁰(6146)⁰, and Λ_b ⁰(6152)⁰ in the Λ_b ⁰π⁺π⁻ mass spectrum is confirmed, and their masses are measured. The Λ_b ⁰π⁺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.

Original language	English
Article number	135345
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	803
DOIs	https://doi.org/10.1016/j.physletb.2020.135345
Publication status	Published - 10 Apr 2020
Externally published	Yes

Keywords

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

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10.1016/j.physletb.2020.135345

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@article{25311b398f4e4eceb5919cca14f443a1,

title = "Study of excited Λb 0 states decaying to Λb 0π+π− in proton-proton collisions at s=13TeV",

abstract = "A study of excited Λb 0 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 Λb 0 states: Λb 0(5912)0, Λb 0(5920)0, Λb 0(6146)0, and Λb 0(6152)0 in the Λb 0π+π− mass spectrum is confirmed, and their masses are measured. The Λb 0π+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",

author = "\{The CMS collaboration\} and Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and T. Bergauer and M. Dragicevic and J. Er{\"o} and \{Escalante Del Valle\}, A. and M. Flechl and R. Fr{\"u}hwirth and M. Jeitler and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and N. Rad and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and W. Waltenberger and Wulz, \{C. E.\} and M. Zarucki and V. Drugakov and V. Mossolov and \{Suarez Gonzalez\}, J. and Darwish, \{M. R.\} and \{De Wolf\}, \{E. A.\} and \{Di Croce\}, D. and X. Janssen and T. Kello and A. Lelek and M. Pieters and \{Rejeb Sfar\}, H. and \{Van Haevermaet\}, H. and \{Van Mechelen\}, P. and \{Van Putte\}, S. and \{Van Remortel\}, N. and F. Blekman and Bols, \{E. S.\} and Chhibra, \{S. S.\} and J. D{\textquoteright}Hondt and \{De Clercq\}, J. and D. Lontkovskyi and S. Lowette and I. Marchesini and S. Moortgat and Q. Python and S. Tavernier and G. Falmagne",

note = "Publisher Copyright: {\textcopyright} 2020 The Author(s)",

year = "2020",

month = apr,

day = "10",

doi = "10.1016/j.physletb.2020.135345",

language = "English",

volume = "803",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Study of excited Λb 0 states decaying to Λb 0π+π− in proton-proton collisions at s=13TeV

AU - The CMS collaboration

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Bergauer, T.

AU - Dragicevic, M.

AU - Erö, J.

AU - Escalante Del Valle, A.

AU - Flechl, M.

AU - Frühwirth, R.

AU - Jeitler, M.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Rad, N.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Waltenberger, W.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Drugakov, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Darwish, M. R.

AU - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Kello, T.

AU - Lelek, A.

AU - Pieters, M.

AU - Rejeb Sfar, H.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Putte, S.

AU - Van Remortel, N.

AU - Blekman, F.

AU - Bols, E. S.

AU - Chhibra, S. S.

AU - D’Hondt, J.

AU - De Clercq, J.

AU - Lontkovskyi, D.

AU - Lowette, S.

AU - Marchesini, I.

AU - Moortgat, S.

AU - Python, Q.

AU - Tavernier, S.

AU - Falmagne, G.

PY - 2020/4/10

Y1 - 2020/4/10

N2 - A study of excited Λb 0 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 Λb 0 states: Λb 0(5912)0, Λb 0(5920)0, Λb 0(6146)0, and Λb 0(6152)0 in the Λb 0π+π− mass spectrum is confirmed, and their masses are measured. The Λb 0π+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.

AB - A study of excited Λb 0 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 Λb 0 states: Λb 0(5912)0, Λb 0(5920)0, Λb 0(6146)0, and Λb 0(6152)0 in the Λb 0π+π− mass spectrum is confirmed, and their masses are measured. The Λb 0π+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.

KW - Beauty baryon

KW - CMS

KW - Experimental results

KW - Flavor spectroscopy

KW - Heavy baryon

KW - Heavy flavor

KW - Physics

UR - https://www.scopus.com/pages/publications/85081618676

U2 - 10.1016/j.physletb.2020.135345

DO - 10.1016/j.physletb.2020.135345

M3 - Article

AN - SCOPUS:85081618676

SN - 0370-2693

VL - 803

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

M1 - 135345

ER -

Study of excited Λb 0 states decaying to Λb 0π+π− in proton-proton collisions at s=13TeV

Abstract

Keywords

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Study of excited Λ_b ⁰ states decaying to Λ_b ⁰π⁺π⁻ in proton-proton collisions at s=13TeV