Pentaquarks and tetraquarks at LHCb

Sheldon Stone

Pentaquarks and tetraquarks at LHCb

Sheldon Stone

Department of Physics

Research output: Contribution to conference › Paper › peer-review

Abstract

Exotic resonant structures found in ?⁰_b and B⁰ decays into charmonium in the LHCb experiment are discussed. Examination of the J/?p system in ?⁰_b ? J/?K^?p decays shows two states each of which must be composed of uudcc quarks, and thus are called charmonium pentaquarks. Their masses are 4380 ±8 ±29 MeV and 4449.8 ±1.7 ±2.5 MeV, and their corresponding widths (?) are 205 ±18 ±86 MeV, and 39 ±5 ±19 MeV. The preferred J^P assignments are of opposite parity, with one state having spin 3/2 and the other 5/2. Models of internal binding of the pentaquark states are discussed. Finally, another mesonic state is discussed, the Z(4430)^? that decays into ?⁰?^? and was first observed by the Belle collaboration in B⁰ ? ?⁰K⁺?^? decays.

Original language	English (US)
State	Published - 2020
Event	2015 Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2015 - Ann Arbor, United States Duration: Aug 4 2015 → Aug 8 2015

Conference

Conference	2015 Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2015
Country/Territory	United States
City	Ann Arbor
Period	8/4/15 → 8/8/15

ASJC Scopus subject areas

General Physics and Astronomy

Cite this

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title = "Pentaquarks and tetraquarks at LHCb",

abstract = "Exotic resonant structures found in ?0b and B0 decays into charmonium in the LHCb experiment are discussed. Examination of the J/?p system in ?0b ? J/?K?p decays shows two states each of which must be composed of uudcc quarks, and thus are called charmonium pentaquarks. Their masses are 4380 ±8 ±29 MeV and 4449.8 ±1.7 ±2.5 MeV, and their corresponding widths (?) are 205 ±18 ±86 MeV, and 39 ±5 ±19 MeV. The preferred JP assignments are of opposite parity, with one state having spin 3/2 and the other 5/2. Models of internal binding of the pentaquark states are discussed. Finally, another mesonic state is discussed, the Z(4430)? that decays into ?0?? and was first observed by the Belle collaboration in B0 ? ?0K+?? decays.",

author = "Sheldon Stone",

note = "Publisher Copyright: {\textcopyright} DPF 2015.All rights reserved.; 2015 Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2015 ; Conference date: 04-08-2015 Through 08-08-2015",

year = "2020",

language = "English (US)",

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TY - CONF

T1 - Pentaquarks and tetraquarks at LHCb

AU - Stone, Sheldon

PY - 2020

Y1 - 2020

N2 - Exotic resonant structures found in ?0b and B0 decays into charmonium in the LHCb experiment are discussed. Examination of the J/?p system in ?0b ? J/?K?p decays shows two states each of which must be composed of uudcc quarks, and thus are called charmonium pentaquarks. Their masses are 4380 ±8 ±29 MeV and 4449.8 ±1.7 ±2.5 MeV, and their corresponding widths (?) are 205 ±18 ±86 MeV, and 39 ±5 ±19 MeV. The preferred JP assignments are of opposite parity, with one state having spin 3/2 and the other 5/2. Models of internal binding of the pentaquark states are discussed. Finally, another mesonic state is discussed, the Z(4430)? that decays into ?0?? and was first observed by the Belle collaboration in B0 ? ?0K+?? decays.

AB - Exotic resonant structures found in ?0b and B0 decays into charmonium in the LHCb experiment are discussed. Examination of the J/?p system in ?0b ? J/?K?p decays shows two states each of which must be composed of uudcc quarks, and thus are called charmonium pentaquarks. Their masses are 4380 ±8 ±29 MeV and 4449.8 ±1.7 ±2.5 MeV, and their corresponding widths (?) are 205 ±18 ±86 MeV, and 39 ±5 ±19 MeV. The preferred JP assignments are of opposite parity, with one state having spin 3/2 and the other 5/2. Models of internal binding of the pentaquark states are discussed. Finally, another mesonic state is discussed, the Z(4430)? that decays into ?0?? and was first observed by the Belle collaboration in B0 ? ?0K+?? decays.

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M3 - Paper

AN - SCOPUS:85086812726

T2 - 2015 Meeting of the Division of Particles and Fields of the American Physical Society, DPF 2015

Y2 - 4 August 2015 through 8 August 2015

ER -

Pentaquarks and tetraquarks at LHCb

Abstract

Conference

ASJC Scopus subject areas

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