Search for the 1P1 charmonium state in annihilations at the CERN intersecting storage rings

Baglin, C.; Baird, S.; Bassompierre, G.; Borreani, G.; Brient, J. C.; Broll, C.; Brom, J.-M.; Bugge, L.; Buran, T.; Burq, J.P.; Bussiére, A.; Buzzo, A.; Cester, R.; Chemarin, M.; Chevallier, M.; Escoubès, B.; Fay, J.; Ferroni, S.; Gracco, V.; Guillaud, J.P.; Khan-Aronsen, E.; Kirsebom, K.; Kylling, Arve; Ille, B.; Lambert, M.; Leistam, L.; Lundby, A.; Macrı́, M.; Marchetto, F.; Menichetti, E.; Morch, C.; Mouellic, B.; Olsen, D.K.; Pastrone, N.; Petrillo, Luca; Pia, M.G.; Poole, J.; Poulet, M.; Rinaudo, G.; Santroni, A.; Severi, M.; Skjevling, G.; Stapnes, S.; Stugu, B.

doi:10.1016/0370-2693(86)91013-0

Cited by 75 publications

(18 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These missing higher states include three 1D states accompanied by ψ(3770) and 2P states in the charmonium family. In fact, there is a big window without discovery of more new charmonia from 1982 to 2003, except h c reported by the R704 Collaboration [20] in 1986. In Fig.…”

Section: Introductionmentioning

confidence: 99%

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite

In this work, we seriously discuss whether X(3915) can be treated as a χ c0 (2P) state. Based on an unquenched quark model, we give the mass spectrum of the χ cJ (2P) states, where there are no free input parameters in our calculation. Our result shows that the mass gap between χ c0 (2P) and χ c2 (2P) can reach 13 MeV, which can reproduce the mass difference between Z(3930) and X(3915). Additionally, the calculated masses of χ c0 (2P) and χ c2 (2P) are consistent with experimental values of X(3915) and Z(3930), respectively. Besides, giving the mass spectrum analysis to support X(3915) as χ c0 (2P), we also calculate the width of χ c0 (2P) with the same framework, which is also consistent with the experimental data of X(3915). Thus, the possibility of charmoniumlike state X(3915) as χ c0 (2P) state is further enforced. ‡ Corresponding author * Electronic address: duanmx16@lzu.edu.cn † Electronic address: luosq15@lzu.edu.cn § Electronic address: xiangliu@lzu.edu.cn ¶ Electronic address: matsuki@tokyo-kasei.ac.jp η c (2S) 1986 h c (1P) 2003 X(3872) 2006 Z(3930) 2010 X(3915) 2013 X(3823) 2017 Y(4220) 2019 X(3842) Established charmonia XYZ states as the candidates of charmonium 17 years FIG. 1: The established charmonia and some XYZ states as possible candidates for charmonium.In 2009, focusing on 2P states, the Lanzhou group carried out the study of the mass spectrum and strong decay behav-arXiv:2002.03311v3 [hep-ph]

show abstract

Section: Introductionmentioning

confidence: 99%

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite

show abstract

“…titatively describe not only meson spectra [34] but also baryon spectra [35]. [1,2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17]. Here, the DD threshold is also given.…”

mentioning

confidence: 99%

Constructing J/ψ family with updated data of charmoniumlike Y states

et al. 2019

View full text Add to dashboard Cite

Based on the updated data of charmoniumlike state Y(4220) reported in the hidden-charm channels of the e + e − annihilation, we propose a 4S -3D mixing scheme to categorize Y(4220) into the J/ψ family. We find that the present experimental data can support this charmonium assignment to Y(4220). Thus, Y(4220) plays a role of a scaling point in constructing higher charmonia above 4 GeV. To further test this scenario, we provide more abundant information on the decay properties of Y(4220), and predict its charmonium partner ψ(4380), whose evidence is found by analyzing the e + e − → ψ(3686)π + π − data from BESIII. If Y(4220) is indeed a charmonium, we must face how to settle the established charmonium ψ(4415) in the J/ψ family. In this work, we may introduce a 5S -4D mixing scheme, and obtain the information of the resonance parameters and partial open-charm decay widths of ψ(4415), which do not contradict the present experimental data. Additionally, we predict a charmonium partner ψ(4500) of ψ(4415), which can be accessible at future experiments, especially, BESIII and BelleII. The studies presented in this work provide new insights to establish the higher charmonium spectrum.PACS numbers: I. INTRODUCTIONIn 1974, J/ψ particle was discovered by the E598 [1] Collaboration in the p + Be → e + + e − + x reaction and the SLAC-SP-017 Collaboration [2] in the e + e − annihilation at the same time. The observation of J/ψ confirmed the existence of a charm quark predicted by the Glashow-Iliopoulos-Maiani mechanism [3]. Since then, a series of charmoniumlike states, ψ(3686) [4], ψ(3770) [5], ψ(4040) [6], ψ(4160) [7], and ψ(4415) [8], were reported, which construct a main body of the observed charmonium spectrum as shown in Particle Data Group (PDG) [9]. In Fig. 1, we collect the corresponding information of the observed charmonia with the year for their first discoveries. It is obvious that the year 1978 is an important time point since most of charmonia listed in the latest PDG were announced.Under this experimental background, the Cornell model was proposed by Eichten et al. [18,19], where the Cornell potential V(r) = −k/r + r/a 2 composed of Coulomb-type and linear potentials, which depicts the interaction between charm and anticharm quarks, was postulated and applied to study the observed charmonia [20]. As a successful phenomenological model, the Cornell model can describe the observed charmonia at that time. Inspired by the Cornell model, different potential models were developed by various groups [21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Among these, a famous one is the Godfrey-Isgur (GI) model [34], which has semi-relativistic expression of the kinetic and potential energy terms. The GI model was employed to quan- * Electronic address:

show abstract

“…We define, in the rest frame of the B meson, p, p ′ and q to be the four-moneta of B, K and h c , k 1(2) , k ′ 1(2) and q 1 (2) to be the momenta of the valence quarks inside B(b(q)), K (s(q) ), and h c (c(c) ), respectively. Then we parameterize the light cone momenta with all the light quarks and mesons being treated as massless…”

Section: Formulationmentioning

confidence: 99%

“…Searching for h c , as well as h b is a challenging task for both experimentalists and theorists of high energy physics [1]. h c was first seen at the CERN Intersecting Storage Rings (ISR) [2], and later the E760 group at Fermilab reported observation of h c by studying the pp → h c → π 0 J/ψ [3]. However, the E835 group claimed that they did not see h c in this channel.…”

Section: Introductionmentioning

confidence: 99%

Calculation of the branching ratio ofB−→hc+K−in perturbative QCD

Liu

Wang

2006

Phys. Rev. D

View full text Add to dashboard Cite

The branching ratio of B − → hc + K − is re-evaluated in the PQCD approach. In this theoretical framework all the phenomenological parameters in the wavefunctions and Sudakov factor are priori fixed by fitting other experimental data, and in the whole numerical computations we do not introduce any new parameter. Our results are consistent with the upper bounds set by the Babar and Belle measurements.

show abstract

Search for the 1P1 charmonium state in annihilations at the CERN intersecting storage rings

Cited by 75 publications

References 2 publications

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite

Constructing J/ψ family with updated data of charmoniumlike Y states

Calculation of the branching ratio ofB−→hc+K−in perturbative QCD

Contact Info

Product

Resources

About

Search for the 1P1 charmonium state in annihilations at the CERN intersecting storage rings

Cited by 75 publications

References 2 publications

Possibility of charmoniumlike state X(3915) as χc0(2P)Duan1, Luo2, Liu3 et al. 2020Phys. Rev. D382250View full textAdd to dashboardCite

Possibility of charmoniumlike state X(3915) as χc0(2P)Duan1, Luo2, Liu3 et al. 2020Phys. Rev. D382250View full textAdd to dashboardCite

Constructing J/ψ family with updated data of charmoniumlike Y states

Calculation of the branching ratio ofB−→hc+K−in perturbative QCD

Contact Info

Product

Resources

About

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite

Possibility of charmoniumlike state X(3915) as χc0(2P)
Duan
¹
,
Luo
²
,
Liu
³

et al. 2020
Phys. Rev. D
38
2
25
0
View full text Add to dashboard Cite