The Pauli exclusion principle (PEP) has been tested for nucleons (n, p) in C-12 with the Borexino detector. The approach consists of a search for gamma, n, p, and beta(+/-) emitted in a non-Paulian transition of 1P(3/2)-shell nucleons to the filled 1S(1/2) shell in nuclei. Due to the extremely low background and the large mass (278 tons) of the Borexino detector, the following most stringent up-to-date experimental bounds on PEP violating transitions of nucleons have been established: tau(C-12 -> (12)(C) over tilde + gamma) >= 5.0 x 10(31) yr, tau(C-12 -> (11)(B) over tilde + p) >= 8.9 x 10(29) yr, tau(C-12 -> (11)(C) over tilde + n) >= 3.4 x 10(30) yr, tau(C-12 -> (12)(N) over tilde + e(-) (nu) over tilde (e)) >= 3.1 x 10(30) yr, and tau(C-12 -> (12) (B) over tilde + e(+) + nu(e)) >= 2.1 x 10(30) yr, all at 90% C.L. The corresponding upper limits on the relative strengths for the searched non-Paulian electromagnetic, strong and weak transitions have been estimated as delta(2)(gamma) <= 2.2 x 10(-57), delta(2)(N) <= 4.1 x 10(-60), and delta(2)(beta) <= 2.1 x 10(-35).

New experimental limits on the Pauli-forbidden transitions in C-12 nuclei obtained with 485 days Borexino data / Bellini, G., Bonetti, S., Avanzini, M.B., Caccianiga, B., D'Angelo, D., Franco, D., Giammarchi, M., Lombardi, P., Ludhova, L., Meroni, E., Miramonti, L., Perasso, L., Ranucci, G., Re, A., Suvorov, Y., Benziger, J., Cadonati, L., Pocar, A., Calaprice, F., Chavarria, A., et al.. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 81:3(2010). [10.1103/PhysRevC.81.034317]

New experimental limits on the Pauli-forbidden transitions in C-12 nuclei obtained with 485 days Borexino data

Meroni, E.;Suvorov, Y.;Calaprice, F.;Carraro, C.;Joyce, M.;
2010

Abstract

The Pauli exclusion principle (PEP) has been tested for nucleons (n, p) in C-12 with the Borexino detector. The approach consists of a search for gamma, n, p, and beta(+/-) emitted in a non-Paulian transition of 1P(3/2)-shell nucleons to the filled 1S(1/2) shell in nuclei. Due to the extremely low background and the large mass (278 tons) of the Borexino detector, the following most stringent up-to-date experimental bounds on PEP violating transitions of nucleons have been established: tau(C-12 -> (12)(C) over tilde + gamma) >= 5.0 x 10(31) yr, tau(C-12 -> (11)(B) over tilde + p) >= 8.9 x 10(29) yr, tau(C-12 -> (11)(C) over tilde + n) >= 3.4 x 10(30) yr, tau(C-12 -> (12)(N) over tilde + e(-) (nu) over tilde (e)) >= 3.1 x 10(30) yr, and tau(C-12 -> (12) (B) over tilde + e(+) + nu(e)) >= 2.1 x 10(30) yr, all at 90% C.L. The corresponding upper limits on the relative strengths for the searched non-Paulian electromagnetic, strong and weak transitions have been estimated as delta(2)(gamma) <= 2.2 x 10(-57), delta(2)(N) <= 4.1 x 10(-60), and delta(2)(beta) <= 2.1 x 10(-35).
2010
New experimental limits on the Pauli-forbidden transitions in C-12 nuclei obtained with 485 days Borexino data / Bellini, G., Bonetti, S., Avanzini, M.B., Caccianiga, B., D'Angelo, D., Franco, D., Giammarchi, M., Lombardi, P., Ludhova, L., Meroni, E., Miramonti, L., Perasso, L., Ranucci, G., Re, A., Suvorov, Y., Benziger, J., Cadonati, L., Pocar, A., Calaprice, F., Chavarria, A., et al.. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 81:3(2010). [10.1103/PhysRevC.81.034317]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11588/713922
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 69
  • ???jsp.display-item.citation.isi??? 71
social impact