Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays

Aaij, R. ; Ruiz-Vidal, Joan LU and Zunica, G. (2024) In Physical Review Letters 133(13).
Abstract
A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parity. This procedure allows the C parities of resonances in the D∗±D∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D∗±D∓: ηc(3945), hc(4000), χc1(4010), and hc(4300), with quantum numbers JPC equal to 0-+, 1+-, 1++, and 1+-, respectively. At least three of these states have not been observed... (More)
A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parity. This procedure allows the C parities of resonances in the D∗±D∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D∗±D∓: ηc(3945), hc(4000), χc1(4010), and hc(4300), with quantum numbers JPC equal to 0-+, 1+-, 1++, and 1+-, respectively. At least three of these states have not been observed previously. In addition, the existence of the Tc¯s¯0∗(2870)0 and Tc¯s¯1∗(2900)0 resonances in the D-K+ mass spectrum, already observed in the B+→D+D-K+ decay, is confirmed in a different production channel. © 2024 CERN. (Less)
Please use this url to cite or link to this publication:
author
; and
author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Center-of-mass energies, Centre-of-mass energies, Charmonium, Integrated luminosity, Mass spectra, Production channels, Proton proton collisions, Quantum numbers, Resonant structures, Two channel, article, controlled study, drug therapy, special situation for pharmacovigilance
in
Physical Review Letters
volume
133
issue
13
article number
131902
publisher
American Physical Society
external identifiers
  • scopus:85206123325
ISSN
1079-7114
DOI
10.1103/PhysRevLett.133.131902
language
English
LU publication?
yes
id
daae5b66-e8a0-4945-bca6-1d73aab7c6d6
date added to LUP
2025-10-14 15:19:16
date last changed
2025-10-14 15:20:18
@article{daae5b66-e8a0-4945-bca6-1d73aab7c6d6,
  abstract     = {{A study of resonant structures in B+→D∗+D-K+ and B+→D∗-D+K+ decays is performed, using proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV recorded by the LHCb experiment, corresponding to an integrated luminosity of 9 fb-1. A simultaneous amplitude fit is performed to the two channels with contributions from resonances decaying to D∗-D+ and D∗+D- states linked by C parity. This procedure allows the C parities of resonances in the D∗±D∓ mass spectra to be determined. Four charmonium or charmoniumlike states are observed decaying into D∗±D∓: ηc(3945), hc(4000), χc1(4010), and hc(4300), with quantum numbers JPC equal to 0-+, 1+-, 1++, and 1+-, respectively. At least three of these states have not been observed previously. In addition, the existence of the Tc¯s¯0∗(2870)0 and Tc¯s¯1∗(2900)0 resonances in the D-K+ mass spectrum, already observed in the B+→D+D-K+ decay, is confirmed in a different production channel. © 2024 CERN.}},
  author       = {{Aaij, R. and Ruiz-Vidal, Joan and Zunica, G.}},
  issn         = {{1079-7114}},
  keywords     = {{Center-of-mass energies; Centre-of-mass energies; Charmonium; Integrated luminosity; Mass spectra; Production channels; Proton proton collisions; Quantum numbers; Resonant structures; Two channel; article; controlled study; drug therapy; special situation for pharmacovigilance}},
  language     = {{eng}},
  number       = {{13}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Observation of New Charmonium or Charmoniumlike States in B+ →D∗±D∓K+ Decays}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.133.131902}},
  doi          = {{10.1103/PhysRevLett.133.131902}},
  volume       = {{133}},
  year         = {{2024}},
}