A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic B-meson decays into a baryon and a dark-sector antibaryon (ψD) with branching fractions accessible at B factories. We present a search for B → Λ ψD decays using data collected by the BABAR experiment at SLAC. This reaction is identified by fully reconstructing the accompanying B meson and requiring the presence of a single Λ baryon in the remaining particles. No significant signal is observed, and bounds on the B → Λ ψD branching fraction are derived in the range 0.13–5.2 × 10^−5 for 1.0 < m_ψD < 4.2 GeV/c^2. These results set strong constraints on the parameter space allowed by the theory.

Search for B mesogenesis at BaBar

Pilloni, A.;
2023-01-01

Abstract

A new mechanism has been proposed to simultaneously explain the presence of dark matter and the matter-antimatter asymmetry in the Universe. This scenario predicts exotic B-meson decays into a baryon and a dark-sector antibaryon (ψD) with branching fractions accessible at B factories. We present a search for B → Λ ψD decays using data collected by the BABAR experiment at SLAC. This reaction is identified by fully reconstructing the accompanying B meson and requiring the presence of a single Λ baryon in the remaining particles. No significant signal is observed, and bounds on the B → Λ ψD branching fraction are derived in the range 0.13–5.2 × 10^−5 for 1.0 < m_ψD < 4.2 GeV/c^2. These results set strong constraints on the parameter space allowed by the theory.
2023
Inglese
Inglese
No
Si
107
9
092001
092005
5
Internazionale
Esperti anonimi
info:eu-repo/semantics/article
Lees, J.  P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D.  N.; Kolomensky, Yu.  G.; Fritsch, M.; Koch, H.; Cheaib, R.; H...espandi
14.a Contributo in Rivista::14.a.1 Articolo su rivista
220
262
none
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3266508
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 8
social impact