Amplitude analysis of B+→ ψ(2S)K+π+π− decays

The LHCb Collaboration; W. Barter; F. Betti; A. Bohare; E. Buchanan; P. E. L. Clarke; R. Currie; S. Eisenhardt; K. Farmer; S. Gambetta; M. Kane; Y. Liu; F. Muheim; M. Needham; F. Oliva; R.H. O'Neil; O. Ozcelik; M. Richardson-Slipper; G. Sarpis; L. Soares Lavra; C. Vrahas; M. R. J. Williams

doi:10.1007/JHEP01(2025)054

Amplitude analysis of B+→ ψ(2S)K+π+π− decays

The LHCb Collaboration, W. Barter, F. Betti, A. Bohare, E. Buchanan, P. E. L. Clarke, R. Currie, S. Eisenhardt, K. Farmer, S. Gambetta, M. Kane, Y. Liu, F. Muheim, M. Needham, F. Oliva, R.H. O'Neil, O. Ozcelik, M. Richardson-Slipper, G. Sarpis, L. Soares LavraC. Vrahas, M. R. J. Williams

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K11(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.

Original language	English
Article number	54
Pages (from-to)	054
Number of pages	1
Journal	Journal of High Energy Physics
Volume	2025
Issue number	1
DOIs	https://doi.org/10.1007/JHEP01(2025)054
Publication status	Published - 8 Jan 2025

Keywords / Materials (for Non-textual outputs)

B Phsyics
Exotics
Hadron-Hadron Scattering
Specroscopy

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10.1007/JHEP01(2025)054Licence: Creative Commons: Attribution (CC-BY)

3 Active
4 Finished

Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
Science and Technology Facilities Council
1/10/22 → 31/03/26
Project: Research
Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons
Barter, W. (Principal Investigator)
UKRI (formerly RCUK)
1/07/22 → 30/06/27
Project: Research

Cite this

The LHCb Collaboration, Barter, W., Betti, F., Bohare, A., Buchanan, E., Clarke, P. E. L., Currie, R., Eisenhardt, S., Farmer, K., Gambetta, S., Kane, M., Liu, Y., Muheim, F., Needham, M., Oliva, F., O'Neil, R. H., Ozcelik, O., Richardson-Slipper, M., Sarpis, G., ... Williams, M. R. J. (2025). Amplitude analysis of B+→ ψ(2S)K+π+π− decays. Journal of High Energy Physics, 2025(1), 054. Article 54. https://doi.org/10.1007/JHEP01(2025)054

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title = "Amplitude analysis of B+→ ψ(2S)K+π+π− decays",

abstract = "The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K11(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.",

keywords = "B Phsyics, Exotics, Hadron-Hadron Scattering, Specroscopy",

author = "\{The LHCb Collaboration\} and W. Barter and F. Betti and A. Bohare and E. Buchanan and Clarke, \{P. E. L.\} and R. Currie and S. Eisenhardt and K. Farmer and S. Gambetta and M. Kane and Y. Liu and F. Muheim and M. Needham and F. Oliva and R.H. O'Neil and O. Ozcelik and M. Richardson-Slipper and G. Sarpis and Lavra, \{L. Soares\} and C. Vrahas and Williams, \{M. R. J.\}",

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doi = "10.1007/JHEP01(2025)054",

language = "English",

volume = "2025",

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The LHCb Collaboration, Barter, W , Betti, F, Bohare, A, Buchanan, E , Clarke, PEL , Currie, R , Eisenhardt, S, Farmer, K, Gambetta, S , Kane, M, Liu, Y, Muheim, F , Needham, M , Oliva, F, O'Neil, RH, Ozcelik, O, Richardson-Slipper, M, Sarpis, G, Lavra, LS, Vrahas, C & Williams, MRJ 2025, 'Amplitude analysis of B+→ ψ(2S)K+π+π− decays', Journal of High Energy Physics, vol. 2025, no. 1, 54, pp. 054. https://doi.org/10.1007/JHEP01(2025)054

TY - JOUR

T1 - Amplitude analysis of B+→ ψ(2S)K+π+π− decays

AU - The LHCb Collaboration

AU - Barter, W.

AU - Betti, F.

AU - Bohare, A.

AU - Buchanan, E.

AU - Clarke, P. E. L.

AU - Currie, R.

AU - Eisenhardt, S.

AU - Farmer, K.

AU - Gambetta, S.

AU - Kane, M.

AU - Liu, Y.

AU - Muheim, F.

AU - Needham, M.

AU - Oliva, F.

AU - O'Neil, R.H.

AU - Ozcelik, O.

AU - Richardson-Slipper, M.

AU - Sarpis, G.

AU - Lavra, L. Soares

AU - Vrahas, C.

AU - Williams, M. R. J.

PY - 2025/1/8

Y1 - 2025/1/8

N2 - The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K11(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.

AB - The first full amplitude analysis of B+ → ψ(2S)K+π+π− decays is performed using proton-proton collision data corresponding to an integrated luminosity of 9 fb−1−1 recorded with the LHCb detector. The rich K+π+π− spectrum is studied and the branching fractions of the resonant substructure associated with the prominent K11(1270)+ contribution are measured. The data cannot be described by conventional strange and charmonium resonances only. An amplitude model with 53 components is developed comprising 11 hidden-charm exotic hadrons. New production mechanisms for charged charmonium-like states are observed. Significant resonant activity with spin-parity JP = 1+ in the ψ(2S)π+ system is confirmed and a multi-pole structure is demonstrated. The spectral decomposition of the ψ(2S)π+π− invariant-mass structure, dominated by X0 → ψ(2S)ρ(770)0 decays, broadly resembles the J/ψϕ spectrum observed in B+ → J/ψϕK+ decays. Exotic ψ(2S)K+π− resonances are observed for the first time.

KW - B Phsyics

KW - Exotics

KW - Hadron-Hadron Scattering

KW - Specroscopy

U2 - 10.1007/JHEP01(2025)054

DO - 10.1007/JHEP01(2025)054

M3 - Article

SN - 1126-6708

VL - 2025

SP - 054

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 1

M1 - 54

ER -

Amplitude analysis of B+→ ψ(2S)K+π+π− decays

Abstract

Keywords / Materials (for Non-textual outputs)

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Projects

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Beautiful Flavours: Discovering New Physics with B-hadrons and Tau-leptons

Cite this