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.

v1: 28 pages, v2: typos fixed, references added, 29 pages, v3: revised, published version, 30 pages

References in corpus (13)

• Big-Bang Nucleosynthesis
• Observation of Two Resonant Structures in e+e- to pi+ pi- psi(2S) via Initial State Radiation at Belle
• 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
• Excited heavy tetraquarks with hidden charm
• A New Hadron Spectroscopy
• Canonical Charmonium Interpretation for Y(4360) and Y(4660)
• Excited Mesons and Quantization of String Endpoints
• 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

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• 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 and Strange Holographic Baryons
• Heavy Holographic Exotics: Tetraquarks as Efimov States
• Inclusive Production Through AdS/CFT
• Holographic heavy-baryons in the Witten-Sakai-Sugimoto model with the D0-D4 background
• The decay width of stringy hadrons
• Quantizing the rotating string with massive endpoints
• Towards a Stringy Description for the $Q\bar{Q}q\bar{q}$-Quark System
• Baryons under Strong Magnetic Fields or in Theories with Space-dependent $\theta$-term
• Holographic charm and bottom pentaquarks III: Excitations through photo-production of heavy mesons
• Holographic three flavor baryon in the Witten-Sakai-Sugimoto model with the D0-D4 background
• Probing Axial-Vector Charmonia ${\chi }_{c1}(1P)$ and ${\chi }_{c1}(2P)$