A Primary Study of Heavy Baryons Λ Q , Σ Q , Ξ Q and Ω Q
نویسندگان
چکیده
منابع مشابه
Weak decays Ξ Q → Λ Q π
The weak decays Ξ b → Λ b π and Ξ c → Λ c π, in which the heavy quark is not destroyed, are discussed. The branching fractions for these decays, corresponding to an absolute rate of order 0.01 ps −1 , should be at a one percent level for the b hyperons and at a (few) per mill level for Ξ c , possibly making feasible their experimental study in future. It is shown, through an application of the ...
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Nakayama (Ann. of Math. 42, 1941) showed that over an artinian serial ring every module is a direct sum of uniserial modules. Hence artinian serial rings have the property that each right (left) ideal is a finite direct sum of quasi-injective right (left) ideals. A ring with the property that each right (left) ideal is a finite direct sum of quasi-injective right (left) ideals will be called a ...
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The spectrum of excited ΛQ-type heavy baryons is considered in the largeNc limit. The universal form factors for Λb semileptonic decay to excited charmed baryons are calculated in the large Nc limit. We find that the Bjorken sum rule (for the slope of the Isgur–Wise function) and Voloshin sum rule (for the mass of the light degrees of freedom) are saturated by the first doublet of excited ΛQ st...
متن کاملq-Poisson, q-Dobinski, q-Rota and q-coherent states
The q-Dobinski formula may be interpreted as the average of powers of random variable X q with the q-Poisson distribution. Forty years ago Rota G. C. [1] proved the exponential generating function for Bell numbers B n to be of the form ∞ n=0 x n n! (B n) = exp(e x − 1) (1) using the linear functional L such that L(X n) = 1, n ≥ 0 (2) Then Bell numbers (see: formula (4) in [1]) are defined by L(...
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ژورنال
عنوان ژورنال: Chinese Physics Letters
سال: 2011
ISSN: 0256-307X,1741-3540
DOI: 10.1088/0256-307x/28/7/071201