Stability of Heavy Tetraquarks

A. Valcarce; J. Vijande; J. M. Richard; H. Garcilazo

doi:10.1007/s00601-018-1331-9

Stability of Heavy Tetraquarks

A. Valcarce, J. Vijande, J. M. Richard, H. Garcilazo

Escuela Superior de Física y Matemáticas (ESFM)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

We discuss the stability of tetraquark systems with two different masses. After some reminders about the stability of very asymmetric QQq¯ q¯ tetraquarks, we demonstrate that in the all-heavy limit q→ Q, the system becomes unstable for standard color-additive models. We also analyze the consequences of symmetry breaking for QqQ¯ q¯ configurations: we find a kind of metastability between the lowest threshold QQ¯ + qq¯ and the highest one, Qq¯ + Q¯ q, and we calculate the width of the resonance. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.

Original language	English
Article number	9
Journal	Few-Body Systems
Volume	59
Issue number	2
DOIs	https://doi.org/10.1007/s00601-018-1331-9
State	Published - 1 Mar 2018

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title = "Stability of Heavy Tetraquarks",

abstract = "We discuss the stability of tetraquark systems with two different masses. After some reminders about the stability of very asymmetric QQq¯ q¯ tetraquarks, we demonstrate that in the all-heavy limit q→ Q, the system becomes unstable for standard color-additive models. We also analyze the consequences of symmetry breaking for QqQ¯ q¯ configurations: we find a kind of metastability between the lowest threshold QQ¯ + qq¯ and the highest one, Qq¯ + Q¯ q, and we calculate the width of the resonance. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.",

author = "A. Valcarce and J. Vijande and Richard, {J. M.} and H. Garcilazo",

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T1 - Stability of Heavy Tetraquarks

AU - Valcarce, A.

AU - Vijande, J.

AU - Richard, J. M.

AU - Garcilazo, H.

PY - 2018/3/1

Y1 - 2018/3/1

N2 - We discuss the stability of tetraquark systems with two different masses. After some reminders about the stability of very asymmetric QQq¯ q¯ tetraquarks, we demonstrate that in the all-heavy limit q→ Q, the system becomes unstable for standard color-additive models. We also analyze the consequences of symmetry breaking for QqQ¯ q¯ configurations: we find a kind of metastability between the lowest threshold QQ¯ + qq¯ and the highest one, Qq¯ + Q¯ q, and we calculate the width of the resonance. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.

AB - We discuss the stability of tetraquark systems with two different masses. After some reminders about the stability of very asymmetric QQq¯ q¯ tetraquarks, we demonstrate that in the all-heavy limit q→ Q, the system becomes unstable for standard color-additive models. We also analyze the consequences of symmetry breaking for QqQ¯ q¯ configurations: we find a kind of metastability between the lowest threshold QQ¯ + qq¯ and the highest one, Qq¯ + Q¯ q, and we calculate the width of the resonance. Our results are consistent with the experimental observation of narrow hadrons lying well above their lowest decay threshold.

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U2 - 10.1007/s00601-018-1331-9

DO - 10.1007/s00601-018-1331-9

M3 - Artículo

SN - 0177-7963

VL - 59

JO - Few-Body Systems

JF - Few-Body Systems

IS - 2

M1 - 9

ER -

Stability of Heavy Tetraquarks

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