TY - JOUR
T1 - Tetraquark cusp effects from diquark pair production
AU - Blitz, Samuel H.
AU - Lebed, Richard
N1 - Publisher Copyright:
© 2015 American Physical Society.
PY - 2015/5/22
Y1 - 2015/5/22
N2 - We present the first study of the cusp effect (the movement of resonant poles due to the proximity of multiparticle thresholds) caused by the creation of diquark-antidiquark pairs. The cusp profile for such states is obtained from constituent counting rules. We compare the effectiveness of diquark cusps in moving resonant poles with that from a phenomenological form commonly used for meson-pair creation and find that mesons tend to be more effective at lower energies (e.g., the KK¯ threshold), while diquarks tend to be more effective at the charm [X(3872)] scales and above.
AB - We present the first study of the cusp effect (the movement of resonant poles due to the proximity of multiparticle thresholds) caused by the creation of diquark-antidiquark pairs. The cusp profile for such states is obtained from constituent counting rules. We compare the effectiveness of diquark cusps in moving resonant poles with that from a phenomenological form commonly used for meson-pair creation and find that mesons tend to be more effective at lower energies (e.g., the KK¯ threshold), while diquarks tend to be more effective at the charm [X(3872)] scales and above.
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U2 - 10.1103/PhysRevD.91.094025
DO - 10.1103/PhysRevD.91.094025
M3 - Article
AN - SCOPUS:84934880797
SN - 1550-7998
VL - 91
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 9
M1 - 094025
ER -