Amplitude analysis of the Λ c+ → pK-π+ decay and Λ c+ baryon polarization measurement in semileptonic beauty hadron decays

An amplitude analysis of Λ c+ → pK-π+ decays together with a measurement of the Λ c+ polarization vector in semiōleptonic beauty hadron decays is presented. A sample of 400 000 candidates is selected from proton-proton collisions recorded by the LHCb detector at a center-of-mass energy of 13 TeV. An...

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Veröffentlicht in:	Physical review. D 2023-07, Vol.108 (1)
Hauptverfasser:	Aaij, R, Abdelmotteleb, A.S.W, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, C.A, Aiola, S, Ajaltouni, Z, Akar, S, Akiba, K, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alvarez Cartelle, P, Amato, S, Amey, J.L, Amhis, Y, An, L, Anderlini, L, Andersson, M, Andreianov, A, Andreotti, M, Andreou, D, Ao, D, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Bachmayer, M, Back, J.J, Bailly-Reyre, A, Baladron Rodriguez, P, Balagura, V, Baldini, W, Baptista de Souza Leite, J, Barbetti, M, Barlow, R.J, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, J.M, Bassi, G, Batsukh, B, Battig, A, Bay, A, Beck, A, Becker, M, Bedeschi, F, Bediaga, I.B, Beiter, A, Belavin, V, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Berninghoff, D, Bernstein, H.C, Bertella, C, Bertolin, A, Betancourt, C, Betti, F, Bezshyiko, Ia, Bhasin, S, Bhom, J, Bian, L, Bieker, M.S, Biesuz, N.V, Bifani, S, Billoir, P, Biolchini, A, Birch, M, Bishop, F.C.R, Bitadze, A, Bizzeti, A, Bjørn, M, Blago, M.P, Blake, T, Blanc, F, Blusk, S, Bobulska, D, Boelhauve, J.A, Boente Garcia, O, Boettcher, T, Boldyrev, A, Bondar, N
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy & Astrophysics High Energy Physics - Experiment Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Beschreibung
Zusammenfassung:	An amplitude analysis of Λ c+ → pK-π+ decays together with a measurement of the Λ c+ polarization vector in semiōleptonic beauty hadron decays is presented. A sample of 400 000 candidates is selected from proton-proton collisions recorded by the LHCb detector at a center-of-mass energy of 13 TeV. An amplitude model is developed and the resonance fractions as well as two- and three-body decay parameters are reported. The mass and width of the Λ ( 2000 ) state are also determined. A significant Λ c+ polarization is found. A large sensitivity of the Λ c+ → pK-π+ decay to the polarization is seen, making the amplitude model suitable for Λ c+ polarization measurements in other systems.
ISSN:	2470-0010 2470-0029
DOI:	10.1103/PhysRevD.108.012023