Study of excited charm-strange baryons with evidence for new baryons<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Ξ</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo stretchy="false">(</mml:mo><mml:mn>3055</mml:mn><mml:msup><mml:mo stretchy="false">)</mml:mo><mml:mo>+</mml:mo></mml:msup></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>Ξ</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo stretchy="false">(</mml:mo><m

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doi:10.1103/physrevd.77.012002

Cited by 91 publications

(37 citation statements)

References 16 publications

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“…Finally, it should be mentioned that the known Ξ c (2970) 0 was observed in the Σ c (2455) 0 K 0 S [9], Ξ ′+ c π − [10], and Ξ c (2645) + π − [10,11] decay modes may correspond two different resonances with a very similar mass. The Ξ c (2970) 0 was observed in the Σ c (2455) 0 K 0 S [9] final state cannot be considered as the same state of Ξ c (2965) 0 although they have a very similar mass, because the Σ c (2455) 0 K 0 S mode of Ξ c (2965) 0 is forbidden as the Ξ ′ c |1 4 P λ 3/2 − state. However, one cannot exclude the Ξ c (2965) 0 resonance as the same resonance observed in the Ξ ′+ c π − [10], and Ξ c (2645) + π − [10, 11] final states.…”

Section: Results and Analysismentioning

confidence: 99%

“…Later, the Ξ c (2930) 0 was confirmed by the Belle Collaboration in the same decay process [7], while its charged partner Ξ c (2930) + was also observed inK 0 Λ + c final state in the reactionB 0 →K 0 Λ + cΛ − c [8]. In addition, another structure Ξ c (2970) 0 was first observed by BaBar in the Σ c (2455) 0 K 0 S decay mode [9]. This structure was also observed in both Ξ ′+ c π − [10] and Ξ c (2645) + π − [11] final states at Belle.…”

Section: Introductionmentioning

confidence: 97%

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Understanding the newly observed Ωc states through their decays

et al. 2017

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Inspired by the newly observed Ξ 0 c states by the LHCb Collaboration, we investigate the OZI-allowed twobody strong decays of the λ-mode 1P wave Ξ ′ c states within the chiral quark model. Our results indicate that: (i) the newly observed states Ξ c (2923) 0 and Ξ c (2939) 0 are good candidates of the λ-mode 1P wave Ξ ′ c states with the spin-parity J P = 3/2 − , namely | 4 P λ 3/2 − and | 2 P λ 3/2 − , respectively. (ii) The another newly observed state Ξ c (2965) 0 mostly corresponds to the λ-mode 1P-wave Ξ ′ c state with the spin-parity J P = 5/2 − , namely | 4 P λ 5/2 − . (iii) For the two λ-mode J P = 1/2 − mixed states, the |P λ 1/2 − 1 is a narrow state with a width of Γ ∼ 15 MeV and mainly decays into Ξ ′ c π; while the |P λ 1/2 − 2 state has a width of Γ ∼ 52 MeV and dominantly decays into Ξ c π and Λ c K channels. If the broad structure around 2880 MeV observed at LHCb arises from the new Ξ 0 c state, this state is very likely to be the |P λ 1/2 − 2 state. m[Ξ c (2939) 0 ] = 2938.55 ± 0.52 MeV, Γ[Ξ c (2939) 0 ] = 10.2 ± 1.9 MeV, m[Ξ c (2965) 0 ] = 2964.88 ± 0.54 MeV, Γ[Ξ c (2965) 0 ] = 14.1 ± 2.2 MeV. As pointed out in Ref. [12], the Ξ c (2930) 0 observed in B − → K − Λ + cΛ −

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Section: Results and Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Understanding the newly observed Ωc states through their decays

et al. 2017

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“…We note that Belle and BaBar recently discovered that transitions between families are possible, i.e., between the Ξ c and Λ + c families of excited charmed baryons [694,1293] and that highly excited states are found to decay into a noncharmed baryons and a D meson [1287,1295]. This section provides a summary of searches for rare and forbidden charm decays in tabular form.…”

Section: Excited Charm Baryonsmentioning

confidence: 99%

Averages of b-hadron, c-hadron, and $$\tau $$ τ -lepton properties as of summer 2016

et al. 2017

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This paper reports world averages of measurements of b-hadron, c-hadron, and τ -lepton properties obtained by the Heavy Flavour Averaging Group using results available before April 2021. In rare cases, significant results obtained several months later are also used. For the averaging, common input parameters used in the various analyses are adjusted (rescaled) to common values, and known correlations are taken into account. The averages include branching fractions, lifetimes, neutral meson mixing parameters, CP violation parameters, parameters of semileptonic decays, and Cabibbo-Kobayashi-Maskawa matrix elements. Selected world averages -continued from previous page. ∆Γ d /Γ d 0.001 ± 0.010 |q d /p d | 1.0010 ± 0.0008 ∆m s 17.765 ± 0.006 ps −1 ∆Γ s +0.084 ± 0.005 ps −1 |q s /p s | 1.0003 ± 0.0014 φ ccs s −0.049 ± 0.019 rad Unitarity-Triangle angle parameters sin2β ≡ sin2φ 1 0.699 ± 0.017 β ≡ φ 1 (22.2 ± 0.7) • −ηS φK 0 S 0.74 +0.11 −0.13 −ηS η K 0 0.63 ± 0.06 −ηS K 0 S K 0 S K 0 S 0.83 ± 0.17 φ s (φφ) −0.073 ± 0.115 ± 0.027 rad S B 0 s →K + K − , C B 0 s →K + K − (0.14 ± 0.03, 0.17 ± 0.03) −ηS J/ψ π 0 0.86 ± 0.14 −ηS D + D − 0.84 ± 0.12 −ηS J/ψ ρ 0 0.66 +0.13 −0.12 +0.09 −0.03(0.343 ± 0.002)% τ parameters, lepton universality, and |V us | g τ /g µ 1.0009 ± 0.0014 g τ /g e 1.0027 ± 0.0014 g µ /g e 1.0019 ± 0.0014* )0 s B ( * )0 s ) = (87.0 ± 1.7)% [34] measured as described in Ref. [35]. The proportions of the various production channels for non-strange B mesons have also been measured [22]. 4.3 b-hadron production fractions at high energy At high energy, all species of weakly decaying b hadrons may be produced, either directly or in strong and electromagnetic decays of excited b hadrons. Before 2010, it was assumed that the fractions of different species in unbiased samples of high-p T b-hadron jets where independent of whether they originated from Z decays, pp collisions at the Tevatron, or pp collisions at the LHC. This hypothesis was plausible under the condition Q 2 Λ 2 QCD , namely, that the square of the momentum transfer to the produced b quarks is large compared with the square of the hadronization energy scale. This hypothesis is correct in the limit p T → ∞, in which the production mechanism of a b hadron is completely described by the fragmentation of the b quark. For finite p T , however, there are interference effects of the production mechanism of the b quark and its hadronization. While formally suppressed by inverse powers of p T , these effects may be sizable, especially when the fragmentation probabilities are small as, e.g., in the case of b baryons. In fact, the available data show that the fractions depend on the kinematics of the produced b hadron. Both CDF and LHCb reported a p T dependence of the fractions, with the fraction of Λ 0 b baryons observed at low p T being enhanced with respect to that seen at LEP at higher p T . In our previous publication [1], we presented two sets of averages, one including only measurements performed at LEP, and another including only measurements performed ...

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“…The charmed baryons Λ c ð2880Þ þ and Λ c ð2940Þ þ were observed by both the BABAR and Belle Collaborations in 2007 [3,4]. The charm-strange baryons Ξ c ð2980Þ þ and Ξ c ð3077Þ 0 were reported by Belle [5] and later confirmed by BABAR [6]. Ξ c ð3055Þ þ and Ξ c ð3123Þ þ were also investigated by BABAR [6].…”

mentioning

confidence: 66%

“…The charm-strange baryons Ξ c ð2980Þ þ and Ξ c ð3077Þ 0 were reported by Belle [5] and later confirmed by BABAR [6]. Ξ c ð3055Þ þ and Ξ c ð3123Þ þ were also investigated by BABAR [6]. Among the expected charmed baryons, the spectrum of the Ω 0 c baryons, which have the quark content of ssc, is still unknown.…”

mentioning

confidence: 98%