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Membre de la SCNAT

CHIPP reunit les chercheuses et chercheurs dans la physique des particules, des astroparticules et de la physique nucléaire en Suisse. Il renforce la participation suisse dans des projets et des comités internationaux. Il coordonne la recherche et les activités d’enseignement et stimule l’intérêt du grand public.en plus

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  • Communiqué de presse
  • Annonce

Observation of the doubly charmed heavy proton Ξcc+ at LHCb experiment.

Switzerland has been on top of the adaptation of the data of the brand-new LHCb Run 3 experiment in physics analyses. This new achievement required a quick calibration of the detector developed in direct collaboration with the analysts, where L. Dufour (at EPFL) contributed. Composed of two charm quarks and one down quark, the doubly charmed particle is four times heavier than a proton.

Artist’s illustration of this exotic particle
Artist’s illustration of this exotic particle
Artist’s illustration of this exotic particleImage : LHCb experiment
Image : LHCb experiment

Today at the Rencontres de Moriond Electroweak meeting, the upgraded LHCb experiment at CERN announced its first particle discovery: a new kind of heavy proton-like particle known as the Ξcc⁺.

Ξcc⁺ is composed of two charm quarks and one down quark, the doubly charmed particle is four times heavier than a proton.

Read the CERN press release: here

Read the LHCb press release: here

A “proton family tree”.
A “proton family tree”.Image : LHCb experiment
A “proton family tree”.
A “proton family tree”.Image : LHCb experiment
  • Artist’s illustration of this exotic particle
  • reconstruction of the combined (“invariant”) mass of these decay products of Ξcc⁺
  • Artist’s illustration of this exotic particleImage : LHCb experiment1/2
  • reconstruction of the combined (“invariant”) mass of these decay products of Ξcc⁺Image : LHCb experiment2/2
  • Artist’s illustration of this exotic particle
  • reconstruction of the combined (“invariant”) mass of these decay products of Ξcc⁺
Artist’s illustration of this exotic particleImage : LHCb experiment1/2

Catégories

  • Physique des particules élémentaires

Contact

Swiss Institute of Particle Physics (CHIPP)
c/o Prof. Dr Paolo Crivelli
ETH Zürich
IPA
Otto-Stern-Weg 5
8093 Zürich

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