A tetraquark or not a tetraquark: A holography inspired stringy hadron (HISH) perspective

Abstract

We suggest to use the state $Y(4630)$, which decays predominantly to ${\Lambda }_c{\bar{\Lambda }}_c$, as a window to the landscape of tetraquarks. We propose a simple criterion to decide whether a state is a genuine stringy exotic hadron - a tetraquark - or a "molecule". If it is the former it should be on a (modified) Regge trajectory. We present the predictions of the mass and width of the higher excited states on the $Y(4630)$ trajectory. We argue that there should exist an analogous "$Y_b$" state that decays to ${\Lambda }_b{\bar{\Lambda }}_b$ and describe its trajectory. We conjecture also a similar trajectory for tetraquarks containing strange quarks, and the modified Regge trajectories can in fact be predicted for any resonances found decaying to a baryon-antibaryon pair. En route to the results regarding tetraquarks, we also make some additional predictions on higher excited charmonium states. We briefly discuss the zoo of exotic stringy hadrons and in particular we sketch all the possibilities of tetraquark states.

arXiv commentv1: 28 pages, v2: typos fixed, references added, 29 pages, v3: revised, published version, 30 pages

References in corpus (31)

• Big-Bang Nucleosynthesis
• The hidden-charm pentaquark and tetraquark states
• Higher Charmonia
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• New Exotic Meson and Baryon Resonances from Doubly-Heavy Hadronic Molecules
• Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/$c^2$ in the Reaction $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\psi (2S)$ Measured at BaBar
• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• Four-Quark Hadrons: an Updated Review
• Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance
• A New Picture for the Formation and Decay of the Exotic $XYZ$ Mesons
• The Effective Theory of Long Strings
• An overview of $XYZ$ new particles
• Excited heavy tetraquarks with hidden charm
• Charmed Baryonium
• A New Hadron Spectroscopy
• A case for hidden $b\bar{b}$ tetraquarks based on $e^{+}{e}^{-}\to b\bar{b}$ cross section between $\sqrt{s}=10.54$ and 11.20 GeV
• Possible Deuteron-like Molecular States Composed of Heavy Baryons
• Canonical Charmonium Interpretation for Y(4360) and Y(4660)
• Holographic decays of large-spin mesons
• Semiclassical Quantization of Effective String Theory and Regge Trajectories
• Reconciling the X(4630) with the Y(4660)
• String Theory of the Regge Intercept
• Quark mass correction to the string potential
• Holography Inspired Stringy Hadrons
• Study on the rare decays of $Y(4630)$ induced by final state interactions
• Excited Mesons and Quantization of String Endpoints
• Glueballs as rotating folded closed strings
• Exploring open-charm decay mode ${\Lambda }_c{\bar{\Lambda }}_c$ of charmonium-like state $Y(4630)$
• A rotating string model versus baryon spectra
• Role of $Y(4630)$ in the $p\bar{p}\to {\Lambda }_c{\bar{\Lambda }}_c$ reaction near threshold
• The non-AdS/non-CFT correspondence, or three different paths to QCD

Cited by in corpus (17)

• Exotics: Heavy Pentaquarks and Tetraquarks
• Exotic hadrons: review and perspectives
• Deciphering the recently discovered tetraquark candidates around 6.9 GeV
• Excited mesons, baryons, glueballs and tetraquarks: Predictions of the Holography Inspired Stringy Hadron model
• Heavy Baryons and their Exotics from Instantons in Holographic QCD
• Heavy Holographic Exotics: Tetraquarks as Efimov States
• Heavy and Strange Holographic Baryons
• Exploring open-charm decay mode ${\Lambda }_c{\bar{\Lambda }}_c$ of charmonium-like state $Y(4630)$
• Holographic heavy-baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background
• The decay width of stringy hadrons
• Inclusive Production Through AdS/CFT
• Quantizing the rotating string with massive endpoints
• Towards a Stringy Description for the $Q\bar{Q}q\bar{q}$-Quark System
• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons
• Baryons under Strong Magnetic Fields or in Theories with Space-dependent $\theta$-term
• Holographic three flavor baryon in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Probing Axial-Vector Charmonia ${\chi }_{c1}(1P)$ and ${\chi }_{c1}(2P)$