Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays

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Aaij, R, Beteta, CA, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S et al (show 90 more authors) , Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Albero, AA, Alkhazov, G, Cartelle, PA, Alves, AA, Amato, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Archilli, F, Romeu, JA, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Back, JJ, Baker, S, Balagura, V, Baldini, W, Baranov, A, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Bassi, G, Batozskaya, V, Batsukh, B, Battig, A, Battista, V, Bay, A, Becker, M, Bedeschi, F, Bediaga, I, Beiter, A, Bel, LJ, Belavin, V, Belin, S, Beliy, N, Bellee, V, Belous, K, Belyaev, I, Bencivenni, G, Ben-Haim, E, Benson, S, Beranek, S, Berezhnoy, A, Bernet, R, Berninghoff, D, Bernstein, HC, Bertholet, E, Bertolin, A, Betancourt, C, Betti, F, Bettler, MO, Bezshyiko, I, Bhasin, S, Bhom, J, Bieker, MS, Bifani, S, Billoir, P, Birnkraut, A, Bizzeti, A, Bjørn, M, Blago, MP, Blake, T, Blanc, F, Blusk, S, Bobulska, D, Bocci, V, Garcia, OB, Boettcher, T, Boldyrev, A, Bondar, A, Bondar, N, Borghi, S, Borisyak, M, Borsato, M, Borsuk, JT, Bowcock, TJV ORCID: 0000-0002-3505-6915, Bozzi, C and Braun, S (2020) Search for CP violation and observation of P violation in Λb0 →pπ-π+π- decays Physical Review D, 102 (5). 051101-. ISSN 2470-0010, 2470-0029

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Abstract

A search for CP violation in the Λb0→pπ-π+π- decay is performed using LHCb data corresponding to an integrated luminosity of 6.6 fb-1 collected in pp collisions at center-of-mass energies of 7, 8 and 13 TeV. The analysis uses both triple product asymmetries and the unbinned energy test method. The highest significances of CP asymmetry are 2.9 standard deviations from triple product asymmetries and 3.0 standard deviations for the energy test method. Once the global p-value is considered, all results are consistent with no CP violation. Parity violation is observed at a significance of 5.5 standard deviations for the triple product asymmetry method and 5.3 standard deviations for the energy test method. The reported deviations are given in regions of phase space.

Item Type:	Article
Additional Information:	All figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2019-028.html (LHCb public pages)
Uncontrolled Keywords:	hep-ex, hep-ex
Depositing User:	Symplectic Admin
Date Deposited:	01 Oct 2020 08:59
Last Modified:	22 Jan 2026 08:18
DOI:	10.1103/PhysRevD.102.051101
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3103126
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