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Observation of an exotic narrow doubly charmed tetraquark
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- Aaij, R. (author)
- Nikhef Natl Inst Subatom Phys, Amsterdam, Netherlands
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- Eklund, Lars (author)
- Uppsala universitet,Kärnfysik,Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland
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- Zunica, G. (author)
- Univ Manchester, Dept Phys & Astron, Manchester, Lancs, England
- (creator_code:org_t)
- 2022-06-16
- 2022
- English.
- In: Nature Physics. - : Springer Nature. - 1745-2473 .- 1745-2481. ; 18:7, s. 751-
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
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- art (subject category)
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