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This paper reports the observation of the decays B0
(s) → Ds1(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The branching fractions of these decays are measured relative to the normalisation channel B0 → D0K+K−. The Ds1(2536)− meson is reconstructed in the D∗(2007)0K− decay channel and the products of branching fractions are measured to be
B(B0s→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D∗(2007)0K−)
= (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10−5,
B(B0→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D∗(2007)0K−)
= (0.510 ± 0.021 ± 0.036 ± 0.050) × 10−5.
The first uncertainty is statistical, the second systematic, and the third arises from the
uncertainty of the branching fraction of the B0 → D0K+K− normalisation channel.
The last uncertainty in the B0s result is due to the limited knowledge of the fragmentation
fraction ratio, fs/fd. The significance for the B0s and B0 signals is larger than
10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the
Ds1(2536)− → D∗(2007)0K− decay is determined from the data. The ratio of the S- and
D-wave amplitudes is found to be 1.11±0.15±0.06 and the phase difference between them
0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic.
Observation of the decays B(s)0 → Ds1(2536)∓K± / R. Aaij, A.S.W.A.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2023:10(2023 Oct 17), pp. 106.1-106.25. [10.1007/JHEP10(2023)106]
Observation of the decays B(s)0 → Ds1(2536)∓K±
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.;Andreola, P.;Andreotti, M.;Andreou, D.;Ao, D.;Archilli, F.;Artamonov, A.;Artuso, M.;Aslanides, E.;Atzeni, M.;Audurier, B.;Bacher, D.;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.;Barbosa, I. R.;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.;Bex, J.;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.;Boettcher, T.;Bohare, A.;Boldyrev, A.;Bolognani, C. S.;Bolzonella, R.;Bondar, N.;Borgato, F.;Borghi, S.;Borsato, M.;Borsuk, J. T.;Bouchiba, S. A.;Bowcock, T. J. V.;Boyer, A.;Bozzi, C.;Bradley, M. J.;Braun, S.;Brea Rodriguez, A.;Breer, N.;Brodzicka, J.;Brossa Gonzalo, A.;Brown, J.;Brundu, D.;Buonaura, A.;Buonincontri, L.;Burke, A. T.;Burr, C.;Bursche, A.;Butkevich, A.;Butter, J. S.;Buytaert, J.;Byczynski, W.;Cadeddu, S.;Cai, H.;Calabrese, R.;Calefice, L.;Cali, S.;Calvi, M.;Calvo Gomez, M.;Cambon Bouzas, J.;Campana, P.;Campora Perez, D. H.;Campoverde Quezada, A. F.;Capelli, S.;Capriotti, L.;Carbone, A.;Carcedo Salgado, L.;Cardinale, R.;Cardini, A.;Carniti, P.;Carus, L.;Casais Vidal, A.;Caspary, R.;Casse, G.;Cattaneo, M.;Cavallero, G.;Cavallini, V.;Celani, S.;Cerasoli, J.;Cervenkov, D.;Chadwick, A. J.;Chahrour, I.;Chapman, M. G.;Charles, M.;Charpentier, Ph.;Chavez Barajas, C. A.;Chefdeville, M.;Chen, C.;Chen, S.;Chernov, A.;Chernyshenko, S.;Chobanova, V.;Cholak, S.;Chrzaszcz, M.;Chubykin, A.;Chulikov, V.;Ciambrone, P.;Cicala, M. F.;Cid Vidal, X.;Ciezarek, G.;Cifra, P.;Ciullo, G.;Clarke, P. E. L.;Clemencic, M.;Cliff, H. V.;Closier, J.;Cobbledick, J. L.;Cocha Toapaxi, C.;Coco, V.;Cogan, J.;Cogneras, E.;Cojocariu, L.;Collins, P.;Colombo, T.;Comerma-Montells, A.;Congedo, L.;Contu, A.;Cooke, N.;Corredoira, I.;Correia, A.;Corti, G.;Cottee Meldrum, J. 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2023
Abstract
This paper reports the observation of the decays B0
(s) → Ds1(2536)∓K± using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb−1. The branching fractions of these decays are measured relative to the normalisation channel B0 → D0K+K−. The Ds1(2536)− meson is reconstructed in the D∗(2007)0K− decay channel and the products of branching fractions are measured to be
B(B0s→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D∗(2007)0K−)
= (2.49 ± 0.11 ± 0.12 ± 0.25 ± 0.06) × 10−5,
B(B0→ Ds1(2536)∓K±) × B(Ds1(2536)−→ D∗(2007)0K−)
= (0.510 ± 0.021 ± 0.036 ± 0.050) × 10−5.
The first uncertainty is statistical, the second systematic, and the third arises from the
uncertainty of the branching fraction of the B0 → D0K+K− normalisation channel.
The last uncertainty in the B0s result is due to the limited knowledge of the fragmentation
fraction ratio, fs/fd. The significance for the B0s and B0 signals is larger than
10 σ. The ratio of the helicity amplitudes which governs the angular distribution of the
Ds1(2536)− → D∗(2007)0K− decay is determined from the data. The ratio of the S- and
D-wave amplitudes is found to be 1.11±0.15±0.06 and the phase difference between them
0.70 ± 0.09 ± 0.04 rad, where the first uncertainty is statistical and the second systematic.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1026620
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simulazione ASN
Il report seguente simula gli indicatori relativi alla propria produzione scientifica in relazione alle soglie ASN 2023-2025 del proprio SC/SSD. Si ricorda che il superamento dei valori soglia (almeno 2 su 3) è requisito necessario ma non sufficiente al conseguimento dell'abilitazione. La simulazione si basa sui dati IRIS e sugli indicatori bibliometrici alla data indicata e non tiene conto di eventuali periodi di congedo obbligatorio, che in sede di domanda ASN danno diritto a incrementi percentuali dei valori. La simulazione può differire dall'esito di un’eventuale domanda ASN sia per errori di catalogazione e/o dati mancanti in IRIS, sia per la variabilità dei dati bibliometrici nel tempo. Si consideri che Anvur calcola i valori degli indicatori all'ultima data utile per la presentazione delle domande.
