Weak radiative decay Λ
b
→Λγ in the heavy quark effective theory |
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Authors: | A K Giri R Mohanta |
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Institution: | (1) Department of Physics, Utkal University, 751 004 Bhubaneswar, India;(2) Physics Department, Punjab University, 160 014 Chandigarh, India |
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Abstract: | The weak radiative decay Λ
b
→Λγ is studied in the heavy quark effective theory treatings-quark as heavy. This rare decay is induced by the short distance electromagnetic penguins. Including corrections of the order
of (1/m
Q), we obtain the transition matrix element and the corresponding decay width. The Isgur-Wise function is evaluated in the
largeN
c limit and the branching ratio obtained is 1.48×10−5. |
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Keywords: | Heavy quark effective theory 1/m Q corrections Isgur-Wise function |
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