TY - JOUR
T1 - The new Σb multiplet, heavy baryon mass predictions, meson-baryon universality and effective supersymmetry in hadron spectrum
AU - Karliner, Marek
AU - Lipkin, Harry J.
N1 - Funding Information:
The research of one of us (M.K.) was supported in part by a grant from the Israel Science Foundation administered by the Israel Academy of Sciences and Humanities. The research of one of us (H.J.L.) was supported in part by the US Department of Energy, Division of Nuclear Physics, under contract number DE-AC02-06CH11357.
PY - 2008/3/6
Y1 - 2008/3/6
N2 - The recent measurement by CDF M (Σb) - M (Λb) = 192 MeV is in striking agreement with our theoretical prediction M (Σb) - M (Λb) = 194 MeV. In addition, the measured splitting M (Σb*) - M (Σb) = 21 MeV agrees well with the predicted splitting of 22 MeV. We point out the connection between these predictions and an effective supersymmetry between mesons and baryons related by replacing a light antiquark by a light diquark. We discuss the theoretical framework behind these predictions and use it to provide additional predictions for the masses of spin-frac(1, 2) and spin-frac(3, 2) baryons containing heavy quarks, as well as for magnetic moments of Λb and Λc.
AB - The recent measurement by CDF M (Σb) - M (Λb) = 192 MeV is in striking agreement with our theoretical prediction M (Σb) - M (Λb) = 194 MeV. In addition, the measured splitting M (Σb*) - M (Σb) = 21 MeV agrees well with the predicted splitting of 22 MeV. We point out the connection between these predictions and an effective supersymmetry between mesons and baryons related by replacing a light antiquark by a light diquark. We discuss the theoretical framework behind these predictions and use it to provide additional predictions for the masses of spin-frac(1, 2) and spin-frac(3, 2) baryons containing heavy quarks, as well as for magnetic moments of Λb and Λc.
UR - http://www.scopus.com/inward/record.url?scp=39149095257&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2008.01.023
DO - 10.1016/j.physletb.2008.01.023
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AN - SCOPUS:39149095257
SN - 0370-2693
VL - 660
SP - 539
EP - 544
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 5
ER -