Study of Ds1(2460)+→Ds+π+π- in B→D[bar](*)D+sπ+π- decays
An amplitude analysis of the Ds1(2460)+→Ds+π+π- transition is performed simultaneously in B0→D-Ds+π+π-, B+→D‾0Ds+π+π-, and B0→D*-Ds+π+π- decays. The study is based on a data sample of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of s=7,8, and 13TeV, correspondi...
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
15 May 2025
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| In: |
Science bulletin
Year: 2025, Volume: 70, Issue: 9, Pages: 1432-1444 |
| ISSN: | 2095-9281 |
| DOI: | 10.1016/j.scib.2025.02.025 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.1016/j.scib.2025.02.025 Verlag, kostenfrei, Volltext: https://www.sciencedirect.com/science/article/pii/S2095927325001872 
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| Author Notes: | LHCb collaboration* |
MARC
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| 245 | 1 | 0 | |a Study of Ds1(2460)+→Ds+π+π- in B→D[bar](*)D+sπ+π- decays |c LHCb collaboration* |
| 246 | 3 | 3 | |a Study of D s 1 (2460) + → D s + pi + pi - in B → D [bar] (*) D + s pi + pi - decays |
| 264 | 1 | |c 15 May 2025 | |
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| 500 | |a Online verfügbar: 25. Februar 2025, Artikelversion: 9. Mai 2025 | ||
| 500 | |a Im Titel sind die Zeichen +, - und das Sternchen-Symbol hochgestellt | ||
| 500 | |a Im Titel sind der Buchstabe "s" und die Zahl 1 tiefgestellt | ||
| 500 | |a Im Titel steht der dritte Buchstabe "D" mit einem Oberstrich | ||
| 500 | |a *LHCb collaboration: R. Aaij, S. Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, M. De Cian, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X. Han, S. Hansmann-Menzemer, P. Herrero Gascon, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S. Roy, M. Ruiz Diaz, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, Y. Zhao, A. Zhelezov [und 1115 weitere Personen] | ||
| 500 | |a Gesehen am 28.11.2025 | ||
| 520 | |a An amplitude analysis of the Ds1(2460)+→Ds+π+π- transition is performed simultaneously in B0→D-Ds+π+π-, B+→D‾0Ds+π+π-, and B0→D*-Ds+π+π- decays. The study is based on a data sample of proton-proton collisions recorded with the LHCb detector at centre-of-mass energies of s=7,8, and 13TeV, corresponding to a total integrated luminosity of 9fb-1. A clear double-peak structure is observed in the m(π+π-) spectrum of the Ds1(2460)+→Ds+π+π- decay. The data can be described either with a model including f0500,f0980, and f2(1270) resonances, in which the contributions of f0(980) and f2(1270) are unexpectedly large, or with a model including f0(500), a doubly charged open-charm tetraquark state Tcs¯ and its isospin partner Tcs¯0. If the former is considered implausible, the Tcs¯ states are observed with high significance, and the data are consistent with isospin symmetry. When imposing isospin constraints between the two Tcs¯ states, their mass and width are determined to be (2327±13±13) MeV and (96±16-23+170) MeV, respectively, where the first uncertainty is statistical and the second is systematic. The mass is slightly below the DK threshold, and a spin-parity of 0+ is favoured with high significance. | ||
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| 650 | 4 | |a Spectroscopy | |
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