Weakly-bound hadronic molecule near a 3-body threshold

Braaten, Eric; Meng, L.; Lee, Jung-Il

doi:10.1103/physrevd.76.054010

Cited by 48 publications

(26 citation statements)

References 32 publications

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“…For the most recent work on the implications of the nearby pion threshold see Refs. [16,17]. For recent work for the X as quark state we refer to Ref.…”

Section: Introductionmentioning

confidence: 99%

Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0

et al. 2007

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We investigate the enhancement in the D 0D0 π 0 final state with the mass M = 3875.2 ± 0.7 +0.3 −1.6 ± 0.8 MeV found recently by the Belle Collaboration in the B → KD 0D0 π 0 decay and test the possibility that this is yet another manifestation of the well-established resonance X(3872). We perform a combined Flattè analysis of the data for the D 0D0 π 0 mode, and for the π + π − J/ψ mode of the X(3872). Only if the X(3872) is a virtual state in the D 0D * 0 channel, the data on the new enhancement comply with those on the X(3872). In our fits, the mass distribution in the D 0D * 0 mode exhibits a peak at 2 ÷ 3 MeV above the D 0D * 0 threshold, with a distinctive non-Breit-Wigner shape.

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“…For the most recent work on the implications of the nearby pion threshold see Refs. [16,17]. For recent work for the X as quark state we refer to Ref.…”

Section: Introductionmentioning

confidence: 99%

Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0

et al. 2007

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“…[394] based on a diquark-antidiquark open-string configuration, while the three-body DDπ dynamics for the X(3872) was investigated in Refs. [636,637]. The selection rules for hadronic transitions between QQ mesons were investigated in Refs.…”

Section: Lattice Qcdmentioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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“…In Refs. [25,26,27,28,29,30], further investigations basing on the molecular assumption are carried out.…”

Section: X(3872)mentioning

confidence: 99%

Is X(3872) really a molecular state?

et al. 2008

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After taking into account both the pion and sigma meson exchange potential, we have performed a dynamical calculation of the D 0 D * 0 system. The σ meson exchange potential is repulsive from heavy quark symmetry and numerically important for a loosely bound system. Our analysis disfavors the interpretation of X(3872) as a loosely bound molecular state if we use the experimental D * Dπ coupling constant g = 0.59 and a reasonable cutoff around 1 GeV, which is the typical hadronic scale. Bound state solutions with negative eigenvalues for the D D * system exist only with either a very large coupling constant (two times of the experimental value) or a large cutoff (Λ ∼ 6 GeV or β ∼ 6 GeV 2 ). In contrast, there probably exists a loosely bound S-wave B B * molecular state. Once produced, such a molecular state would be rather stable since its dominant decay mode is the radiative decay through B * → Bγ. Experimental search of these states will be very interesting.

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Weakly-bound hadronic molecule near a 3-body threshold

Cited by 48 publications

References 32 publications

Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0

Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0

The hidden-charm pentaquark and tetraquark states

Is X(3872) really a molecular state?

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