Measurement of the Λ b0 → Λ ( 1520 ) μ+μ- Differential Branching Fraction

The branching fraction of the rare decay Λ b0 → Λ ( 1520 ) μ+μ- is measured for the first time, in the squared dimuon mass intervals q2 , excluding the J/ψ and ψ ( 2S ) regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, correspondin...

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Veröffentlicht in:	Physical review letters 2023-10, Vol.131 (15)
Hauptverfasser:	Aaij, R, Abdelmotteleb, A.S.W, Abellan Beteta, C, Abudinén, F, Ackernley, T, Adeva, B, Adinolfi, M, Adlarson, P, Afsharnia, H, Agapopoulou, C, Aidala, C.A, Ajaltouni, Z, Akar, S, Akiba, K, Albicocco, P, Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alvarez Cartelle, P, Amalric, R, 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, Bachiller Perea, I, 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, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Benane, G, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Bernet Andres, S, Berninghoff, D, Bernstein, H.C, Bertella, C, Bertolin, A, Betancourt, C, Betti, F, Bezshyiko, Ia, Bhom, J, Bian, L, Bieker, M.S, Biesuz, N.V, Billoir, P, Biolchini, A, Birch, M, Bishop, F.C.R, Bitadze, A, Bizzeti, A, Blago, M.P, Blake, T, Blanc, F, Blank, J.E, Blusk, S, Bobulska, D, Bocharnikov, V, Boelhauve, J.A, Boente Garcia, O
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Physics
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Zusammenfassung:	The branching fraction of the rare decay Λ b0 → Λ ( 1520 ) μ+μ- is measured for the first time, in the squared dimuon mass intervals q2 , excluding the J/ψ and ψ ( 2S ) regions. The data sample analyzed was collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb-1 . The result in the highest q2 interval, q2>15.0 GeV2/c4 , where theoretical predictions have the smallest model dependence, agrees with the predictions.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.131.151801