J
 
 P
 
 assignments of Λ
 +
 c
 baryons

Chen, Bing; Wang, Deng-Xia; Zhang, Ailin

doi:10.1088/1674-1137/33/12/047

Cited by 28 publications

(11 citation statements)

References 31 publications

(46 reference statements)

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“…(m q is the bare mass of the light quark u or d, s) The relation (7) was derived in Refs. [45,48] for the singly heavy baryons. A phenomenological study [25] of the relation (7) was made more recently for both heavy-light mesons and singly heavy baryons, favoring (7) to be a mass relation mapping experimental data for all heavy-light hadron systems.…”

Section: Regge-like Mass Relation For Orbitally and Radially Excimentioning

confidence: 99%

Regge-like spectra of excited singly heavy mesons

Jia

Dong

2019

Eur. Phys. J. Plus

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In this work, we study the Regge-like spectra of excited singly heavy mesons by proposing a general Reggelike mass relations in which the slope ratio α ′ /β ′ between the radial and angular-momentum Regge trajectories is π/2 and the hadron mass undergoes a shift including the heavy quark mass and an extra binding energy between heavy quark and strange anti-quark. The relation is successfully tested against the observed spin-averaged data of the singly heavy mesons in their radially and angularly excited states. Some new predictions are made for more excited excitations and the discussion is given associated with the QCD string (flux tube) picture. I. INTRODUCTIONDuring the last two decades, heavy meson spectroscopy has been greatly enlarged due to the discovery of numerous excited charm and charm-strange states (charm mesons hereafter) by the B-Factory experiments BaBar, Belle, CLEO and recently by the LHCb experiment [1]. One of recent examples is the observations of the heavy mesons B(5970) by the CDF Collaboration in the B + π − and B 0 π + mass distributions [2] and the B J (5960) by the LHCb Collaboration in the Bπ mass distributions [3]. The first observation determined the mass of the B (5970) resonances to be 5978 ± 5 ± 12 MeV for the neutral state and to be 5961 ± 5 ± 12 MeV for the charged state. The second observation, giving the mass of 5969.2 ± 2.9 ± 5.3 MeV for the neutral state and 82.3 ± 7.7 ± 9 : 4 MeV for the charged state for B J (5960), seems to be consistent with the B(5970) in their properties, and they may be the same state. Another example is the observation of the charmed states of D J (3000) by the LHCb Collaboration in the Dπ mass distribution data from pp collision [4,5]. These experimental findings arouses theoretical interests to explore and accommodate the newly-discovered states with various approaches, e.g., with the potential quark models [6-18], Lattice QCD [19,20] and other approaches (see Ref.[21] for a recent review). For the B(5970), the two main interpretations exist, with the assignments 2 3 S 1 [22] and the candidate of 1 3 D 3 state [23]. For the D J (3000) and D * J (3000), there are the different interpretations, the D(3 1 S 0 ) and the D(3 3 S 1 ) states, respectively, or the candidates of D(1F) or D(2P). For the D * 2 (3000) the prediction favoring D(3 3 P 2 ) was given [24].In Ref. [25], a comprehensive analysis was made for the whole singly heavy systems of mesons and baryons using the Regge-like mass relation,with M Q the heavy quark mass, supporting that all heavy-light hadrons fall on straight lines in a "shifted" orbital trajectory plane: M → M − M Q , with the slope (α) nearly half of that for the light hadrons. Here, L is the orbital angular momentum of the hadron system. This reflects that the notion of Regge trajectory, which is widely-used in light-flavor sector and stems * Electronic address: jiadj@nwnu.edu.cn from the well-known Regge theory of the scattering matrix [26], remains to be useful in the spectra of the heavy flavor hadrons if one shifts the h...

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Section: Regge-like Mass Relation For Orbitally and Radially Excimentioning

confidence: 99%

Regge-like spectra of excited singly heavy mesons

Jia

Dong

2019

Eur. Phys. J. Plus

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“…Many tentative J P assignments to these Λ c states have been made in many models [3,. In addition to normal charmed baryon interpretations [3,[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], there are also coupled-channel effect interpretations [23,24] and molecular state interpretations of these Λ c states [25][26][27][28][29][30][31][32]. In Table II, some possible J P assignments of Λ c states within the charmed baryon interpretations are presented.…”

Section: Introductionmentioning

confidence: 99%

Strong decays of observed Λc baryons in the P03
Guo
¹
,
Yang
²
,
Zhang
³

2019
Phys. Rev. D
38
3
27
0
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“…It is noted that direct p " p annihilation into " Ã c Ã c ð2940Þ þ is negligible TABLE I. The possible J P assignments to the Ã c ð2940Þ þ in the literature [3][4][5][6][7][8][9][10][11][12][13][14][15]. Here, we use ''!''…”

Section: Effective Lagrangians and Coupling Constantmentioning

confidence: 99%

Production of the charmed baryonΛc(2940)+at PANDA

Ouyang

Liu

et al. 2011

Phys. Rev. D

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In this work we evaluate the production rate of the charmed baryon Λ c (2940) + at PANDA. For possible assignments of Λ c (2940) + : J P = 1/2 ± , 3/2 ± and 5/2 ± , the total cross section of p p → Λc Λ c (2940) + is estimated, which may exceed 1 nb. With the designed luminosity (2 × 10 −32 cm −2 /s) of PANDA, our estimate indicates that ten thousand events per day if Λ c (2940) + is of J P = 1/2 + or 10 8 per day if it is of J P = 5/2 + can be expected. Those values actually set the lower and upper limits of the Λ c (2940) + production. In addition, we present the Dalitz plot and carry out a rough background analysis of the Λ c (2940) + production in the p p → D 0 p Λc and p p → Σ 0,++ c π +,− Λc processes, which would provide valuable information for accurate determination of the Λ c (2940) + identity.

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J ^P assignments of Λ ⁺ ^c baryons

Cited by 28 publications

References 31 publications

Regge-like spectra of excited singly heavy mesons

Regge-like spectra of excited singly heavy mesons

Strong decays of observed Λc baryons in the P03
Guo
¹
,
Yang
²
,
Zhang
³

2019
Phys. Rev. D
38
3
27
0
View full text Add to dashboard Cite

Production of the charmed baryonΛc(2940)+at PANDA

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J P assignments of Λ + c baryons

Cited by 28 publications

References 31 publications

Regge-like spectra of excited singly heavy mesons

Regge-like spectra of excited singly heavy mesons

Strong decays of observed Λc baryons in the P03Guo1, Yang2, Zhang3 2019Phys. Rev. D383270View full textAdd to dashboardCite

Production of the charmed baryonΛc(2940)+at PANDA

Contact Info

Product

Resources

About

J ^P assignments of Λ ⁺ ^c baryons

Strong decays of observed Λc baryons in the P03
Guo
¹
,
Yang
²
,
Zhang
³

2019
Phys. Rev. D
38
3
27
0
View full text Add to dashboard Cite