Search for a massless particle beyond the Standard Model in the ?+???p?+?invisible decay
Küçük Resim Yok
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier B.V.
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
A massless particle beyond the Standard Model is searched for in the two-body decay ?+?p+invisible using (1.0087±0.0044)×1010 J/? events collected at a center-of-mass energy of s=3.097GeV with the BESIII detector at the BEPCII collider. No significant signal is observed, and the upper limit on the branching fraction B(?+?p+invisible) is determined to be 3.2×10?5 at the 90% confidence level. This is the first search for a flavor-changing neutral current process with missing energy in hyperon decays which plays an important role in constraining new physics models. © 2024 The Author(s)
Açıklama
Anahtar Kelimeler
Besııı, Bsm Particle, Fcnc Process, Hyperon Decay
Kaynak
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
852
