https://doi.org/10.1140/epja/i2006-08-004-y
Nuclear Physics in Astrophysics II
Search for rare processes with DAMA/LXe experiment at Gran Sasso
1
Dipartimento di Fisica, Università di Roma “Tor Vergata” and INFN, Sezione di Roma II, I-00133, Roma, Italy
2
Dipartimento di Fisica, Università di Roma “La Sapienza” and INFN, Sezione di Roma, I-00185, Roma, Italy
3
Laboratori Nazionali del Gran Sasso, INFN, I-67010, Assergi, Italy
4
IHEP, Chinese Academy, P.O. Box 918/3, 100039, Beijing, PRC
5
Institute for Nuclear Research, MSP 03680, Kiev, Ukraine
* e-mail: riccardo.cerulli@lngs.infn.it
Received:
20
June
2005
Accepted:
20
December
2005
Published online:
22
February
2006
After a short introduction on the low background liquid xenon DAMA set-up (DAMA/LXe) and its main previous results, we discuss the search for the nucleon, di-nucleon and tri-nucleon decays into invisible channels (disappearance or decay to neutrinos, Majorons, etc.) in the 136Xe isotope. The obtained limits (90% C.L.) on the lifetimes are: τn > 3.3 . 1023yr, τp > 4.5 . 1023yr, τnp > 3.2 . 1023yr, τpp > 1.9 . 1024yr, τnnp > 1.4 . 1022yr, τnpp > 2.7 . 1022yr and τppp > 3.6 . 1022yr. In particular, the tri-nucleon decay into invisible channels is investigated here for the first time.
PACS: 29.40.Mc Scintillation detectors – / 95.35.+d Dark matter (stellar, interstellar, galactic, and cosmological) – / 11.30.Fs Global symmetries (e.g. , baryon number, lepton number) –
© Società Italiana di Fisica and Springer-Verlag, 2006