Near-threshold $$ \mathrm{D}\overline{\mathrm{D}} $$ spectroscopy and observation of a new charmonium state

The LHCb collaboration

doi:10.1007/JHEP07(2019)035

Near-threshold $$ \mathrm{D}\overline{\mathrm{D}} $$ spectroscopy and observation of a new charmonium state

The LHCb collaboration

Science Park 105
Physik-Institut
University of Zurich
Universidade de Santiago de Compostela
University of Bristol
University of Michigan, Ann Arbor
Clermont-Auvergne University
University of Cincinnati
LNF-INFN
Fakultät Physik
University of Dortmund
European Organization for Nuclear Research
SUPA
University of Glasgow
ICCUB
University of Barcelona
Petersburg Nuclear Physics Institute (PNPI)
Imperial College London
Instituto de Biofisica da UFRJ
Laboratoire de l'Accélérateur Linéaire
Istituto Nazionale di Fisica Nucleare, Sezione di Firenze
Institute of Physics
ENAC-IIC-GEL
Sezione INFN di Ferrara
University of Maryland, College Park
Aix Marseille Université
Kurchatov Institute
Syracuse University
Yandex School of Data Analysis
Sezione INFN di Cagliari
Physikalisches Institut
University of Heidelberg
Department of Physics
University of Warwick
School of Physics and Astronomy
University of Manchester
Sezione di Genova
National University of Science and Technology “MISIS”
National Centre for Nuclear Research (NCBJ)
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Centro Brasileiro de Pesquisas Fisicas

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

51 Citations (Scopus)

Abstract

Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb⁻¹, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D⁺D⁻. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ₃ 1³D₃) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ₂(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].

Original language	English
Article number	35
Journal	Journal of High Energy Physics
Volume	2019
Issue number	7
DOIs	https://doi.org/10.1007/JHEP07(2019)035
Publication status	Published - 1 Jul 2019

Keywords

Charm physics
Hadron-Hadron scattering (experiments)
Heavy quark production
Quarkonium

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10.1007/JHEP07(2019)035

Cite this

@article{6a5b2f127f89419fb93ee5624f15b84b,

title = "Near-threshold \$\$ \textbackslash{}mathrm\{D\}\textbackslash{}overline\{\textbackslash{}mathrm\{D\}\} \$\$ spectroscopy and observation of a new charmonium state",

abstract = "Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].",

keywords = "Charm physics, Hadron-Hadron scattering (experiments), Heavy quark production, Quarkonium",

author = "\{The LHCb collaboration\} and R. Aaij and \{Abell{\'a}n Beteta\}, C. and B. Adeva and M. Adinolfi and Aidala, \{C. A.\} and Z. Ajaltouni and S. Akar and P. Albicocco and J. Albrecht and F. Alessio and M. Alexander and \{Alfonso Albero\}, A. and G. Alkhazov and \{Alvarez Cartelle\}, P. and Alves, \{A. A.\} and S. Amato and Y. Amhis and L. An and L. Anderlini and G. Andreassi and M. Andreotti and Andrews, \{J. E.\} and F. Archilli and \{Arnau Romeu\}, J. and A. Artamonov and M. Artuso and K. Arzymatov and E. Aslanides and M. Atzeni and B. Audurier and S. Bachmann and Back, \{J. J.\} and S. Baker and V. Balagura and W. Baldini and A. Baranov and Barlow, \{R. J.\} and S. Barsuk and W. Barter and M. Bartolini and F. Baryshnikov and V. Batozskaya and B. Batsukh and A. Battig and V. Battista and A. Bay and F. Bedeschi and I. Bediaga and F. Fleuret and E. Maurice",

note = "Publisher Copyright: {\textcopyright} 2019, The Author(s).",

year = "2019",

month = jul,

day = "1",

doi = "10.1007/JHEP07(2019)035",

language = "English",

volume = "2019",

journal = "Journal of High Energy Physics",

issn = "1126-6708",

publisher = "Springer Verlag",

number = "7",

}

TY - JOUR

T1 - Near-threshold $$ \mathrm{D}\overline{\mathrm{D}} $$ spectroscopy and observation of a new charmonium state

AU - The LHCb collaboration

AU - Aaij, R.

AU - Abellán Beteta, C.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Aidala, C. A.

AU - Ajaltouni, Z.

AU - Akar, S.

AU - Albicocco, P.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Alfonso Albero, A.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Andreassi, G.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Archilli, F.

AU - Arnau Romeu, J.

AU - Artamonov, A.

AU - Artuso, M.

AU - Arzymatov, K.

AU - Aslanides, E.

AU - Atzeni, M.

AU - Audurier, B.

AU - Bachmann, S.

AU - Back, J. J.

AU - Baker, S.

AU - Balagura, V.

AU - Baldini, W.

AU - Baranov, A.

AU - Barlow, R. J.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Batozskaya, V.

AU - Batsukh, B.

AU - Battig, A.

AU - Battista, V.

AU - Bay, A.

AU - Bedeschi, F.

AU - Bediaga, I.

AU - Fleuret, F.

AU - Maurice, E.

PY - 2019/7/1

Y1 - 2019/7/1

N2 - Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].

AB - Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].

KW - Charm physics

KW - Hadron-Hadron scattering (experiments)

KW - Heavy quark production

KW - Quarkonium

U2 - 10.1007/JHEP07(2019)035

DO - 10.1007/JHEP07(2019)035

M3 - Article

AN - SCOPUS:85068784458

SN - 1126-6708

VL - 2019

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 7

M1 - 35

ER -

Near-threshold $$ \mathrm{D}\overline{\mathrm{D}} $$ spectroscopy and observation of a new charmonium state

Abstract

Keywords

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