Observation of an exotic narrow doubly charmed tetraquark

LHCb collaboration; R.H. O'Neil

doi:10.1038/s41567-022-01614-y

Observation of an exotic narrow doubly charmed tetraquark

LHCb collaboration, R.H. O'Neil

School of Physics and Astronomy

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

Abstract / Description of output

Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively(1,2). Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) mesons just below the D*D-+(0) mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.

Original language	English
Pages (from-to)	751-754
Number of pages	4
Journal	Nature Physics
Volume	18
Issue number	7
DOIs	https://doi.org/10.1038/s41567-022-01614-y
Publication status	Published - 16 Jun 2022

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http://arxiv.org/abs/2109.01038

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Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/04/23 → 30/09/25
Project: Research
Next generation photodetectors for future applications
Oliva, F.
1/12/22 → 30/11/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C.
1/10/22 → 30/09/25
Project: Research

Cite this

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title = "Observation of an exotic narrow doubly charmed tetraquark",

abstract = "Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively(1,2). Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) mesons just below the D*D-+(0) mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.",

author = "{LHCb collaboration} and William Barter and P.E.L. Clarke and S. Gambetta and F. Muheim and M. Needham and Mark Williams and Federico Betti and Robert Currie and S. Eisenhardt and Lavra, {Lais Soares} and Oliva Federica and Gediminas Sarpis and R.H. O'Neil",

year = "2022",

month = jun,

day = "16",

doi = "10.1038/s41567-022-01614-y",

language = "English",

volume = "18",

pages = "751--754",

journal = "Nature Physics",

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publisher = "Nature Publishing Group",

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TY - JOUR

T1 - Observation of an exotic narrow doubly charmed tetraquark

AU - LHCb collaboration

AU - Barter, William

AU - Clarke, P.E.L.

AU - Gambetta, S.

AU - Muheim, F.

AU - Needham, M.

AU - Williams, Mark

AU - Betti, Federico

AU - Currie, Robert

AU - Eisenhardt, S.

AU - Lavra, Lais Soares

AU - Federica, Oliva

AU - Sarpis, Gediminas

AU - O'Neil, R.H.

PY - 2022/6/16

Y1 - 2022/6/16

N2 - Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively(1,2). Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) mesons just below the D*D-+(0) mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.

AB - Conventional, hadronic matter consists of baryons and mesons made of three quarks and a quark-antiquark pair, respectively(1,2). Here, we report the observation of a hadronic state containing four quarks in the Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, a (u) over bar and a (d) over tilde quark. This exotic state has a mass of approximately 3,875 MeV and manifests as a narrow peak in the mass spectrum of (DD0)-D-0 pi(+) mesons just below the D*D-+(0) mass threshold. The near-threshold mass together with the narrow width reveals the resonance nature of the state.

U2 - 10.1038/s41567-022-01614-y

DO - 10.1038/s41567-022-01614-y

M3 - Article

SN - 1745-2473

VL - 18

SP - 751

EP - 754

JO - Nature Physics

JF - Nature Physics

IS - 7

ER -

Observation of an exotic narrow doubly charmed tetraquark

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Experimental Particle Physics at the University of Edinburgh

Next generation photodetectors for future applications

Experimental Particle Physics at the University of Edinburgh

Cite this