TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2017
DA  - 2017//
TI  - Measurement of matter-antimatter differences in beauty baryon decays
T2  - Nat. Phys.
JO  - Nature Physics
SP  - 391
EP  - 396
VL  - 13
IS  - 4
PB  - Nature Publishing Group
AB  - Differences in the behaviour of matter and antimatter have been observed in K and B meson decays, but not yet in any baryon decay. Such differences are associated with the non-invariance of fundamental interactions under the combined chargeconjugation and parity transformations, known as CP violation. Here, using data from the LHCb experiment at the Large Hadron Collider, we search for CP-violating asymmetries in the decay angle distributions of A(b)(0) baryons decaying to p pi(-)pi(+)pi(-) and p pi-K+K- final states. These four-body hadronic decays are a promising place to search for sources of CP violation both within and beyond the standard model of particle physics. We find evidence for CP violation in A(b)(0) to p pi(-)pi(+)pi(-) decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for CP violation in the baryon sector.
SN  - 1745-2473
UR  - http://arxiv.org/abs/1612.03207
UR  - https://doi.org/10.1038/NPHYS4021
DO  - 10.1038/NPHYS4021
LA  - English
N1  - WOS:000398262900020
ID  - LHCbCollaborationAaij_etal2017
ER  -