Publication

Observation of New Resonances in the Λ 0 b π + π − System

LHCb Collaboration, 11-Oct-2019, In : Physical Review Letters. 123, 15, 11 p., 152001.

Research output: Contribution to journalArticleAcademicpeer-review

APA

LHCb Collaboration (2019). Observation of New Resonances in the Λ 0 b π + π − System. Physical Review Letters, 123(15), [152001]. https://doi.org/10.1103/PhysRevLett.123.152001

Author

LHCb Collaboration. / Observation of New Resonances in the Λ 0 b π + π − System. In: Physical Review Letters. 2019 ; Vol. 123, No. 15.

Harvard

LHCb Collaboration 2019, 'Observation of New Resonances in the Λ 0 b π + π − System', Physical Review Letters, vol. 123, no. 15, 152001. https://doi.org/10.1103/PhysRevLett.123.152001

Standard

Observation of New Resonances in the Λ 0 b π + π − System. / LHCb Collaboration.

In: Physical Review Letters, Vol. 123, No. 15, 152001, 11.10.2019.

Research output: Contribution to journalArticleAcademicpeer-review

Vancouver

LHCb Collaboration. Observation of New Resonances in the Λ 0 b π + π − System. Physical Review Letters. 2019 Oct 11;123(15). 152001. https://doi.org/10.1103/PhysRevLett.123.152001


BibTeX

@article{df01008f2f5e425985a7e63b0ce263e5,
title = "Observation of New Resonances in the Λ 0 b π + π − System",
abstract = "We report the observation of a new structure in the Λ0bπ+π− spectrum using the full LHCb data set of pp collisions, corresponding to an integrated luminosity of 9  fb−1, collected at √s=7, 8, and 13 TeV. A study of the structure suggests its interpretation as a superposition of two almost degenerate narrow states. The masses and widths of these states are measured to bemΛb(6146)0=6146.17±0.33±0.22±0.16  MeV,mΛb(6152)0=6152.51±0.26±0.22±0.16  MeV,ΓΛb(6146)0=2.9±1.3±0.3  MeV,ΓΛb(6152)0=2.1±0.8±0.3  MeV,with a mass splitting of Δm=6.34±0.32±0.02  MeV, where the first uncertainty is statistical, the second systematic. The third uncertainty for the mass measurements derives from the knowledge of the mass of the Λ0b baryon. The measured masses and widths of these new excited states suggest their possible interpretation as a doublet of Λb(1D)0 states.",
keywords = "BARYONS, DECAY, MODEL, TOOL",
author = "R. Aaij and B. Adeva and M. Adinolfi and Z. Ajaltouni and S. Akar and J. Albrecht and F. Alessio and L. Dufour and M Mulder and Onderwater, {C. J. G.} and A. Pellegrino and S. Tolk and {van Veghel}, M. and {LHCb Collaboration}",
year = "2019",
month = "10",
day = "11",
doi = "10.1103/PhysRevLett.123.152001",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "AMER PHYSICAL SOC",
number = "15",

}

RIS

TY - JOUR

T1 - Observation of New Resonances in the Λ 0 b π + π − System

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albrecht, J.

AU - Alessio, F.

AU - Dufour, L.

AU - Mulder, M

AU - Onderwater, C. J. G.

AU - Pellegrino, A.

AU - Tolk, S.

AU - van Veghel, M.

AU - LHCb Collaboration

PY - 2019/10/11

Y1 - 2019/10/11

N2 - We report the observation of a new structure in the Λ0bπ+π− spectrum using the full LHCb data set of pp collisions, corresponding to an integrated luminosity of 9  fb−1, collected at √s=7, 8, and 13 TeV. A study of the structure suggests its interpretation as a superposition of two almost degenerate narrow states. The masses and widths of these states are measured to bemΛb(6146)0=6146.17±0.33±0.22±0.16  MeV,mΛb(6152)0=6152.51±0.26±0.22±0.16  MeV,ΓΛb(6146)0=2.9±1.3±0.3  MeV,ΓΛb(6152)0=2.1±0.8±0.3  MeV,with a mass splitting of Δm=6.34±0.32±0.02  MeV, where the first uncertainty is statistical, the second systematic. The third uncertainty for the mass measurements derives from the knowledge of the mass of the Λ0b baryon. The measured masses and widths of these new excited states suggest their possible interpretation as a doublet of Λb(1D)0 states.

AB - We report the observation of a new structure in the Λ0bπ+π− spectrum using the full LHCb data set of pp collisions, corresponding to an integrated luminosity of 9  fb−1, collected at √s=7, 8, and 13 TeV. A study of the structure suggests its interpretation as a superposition of two almost degenerate narrow states. The masses and widths of these states are measured to bemΛb(6146)0=6146.17±0.33±0.22±0.16  MeV,mΛb(6152)0=6152.51±0.26±0.22±0.16  MeV,ΓΛb(6146)0=2.9±1.3±0.3  MeV,ΓΛb(6152)0=2.1±0.8±0.3  MeV,with a mass splitting of Δm=6.34±0.32±0.02  MeV, where the first uncertainty is statistical, the second systematic. The third uncertainty for the mass measurements derives from the knowledge of the mass of the Λ0b baryon. The measured masses and widths of these new excited states suggest their possible interpretation as a doublet of Λb(1D)0 states.

KW - BARYONS

KW - DECAY

KW - MODEL

KW - TOOL

U2 - 10.1103/PhysRevLett.123.152001

DO - 10.1103/PhysRevLett.123.152001

M3 - Article

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 15

M1 - 152001

ER -

ID: 118605490