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CP violation in polarized B-> pi ell+ ell- and B-> rho ell+ ell- decays
We study the decay rate and the CP violating asymmetry of the exclusive B->
pi ell+ ell- and B-> rho ell+ ell- decays in the case where one of the final
leptons is polarized. We calculate the contributions coming from the individual
polarization states in order to identify a so-called wrong sign decay, which is
a decay with a given polarization, whose width and CP asymmetry are smaller as
compared to the unpolarized one. The results are presented for electron and tau
leptons. We observe that in particular decay channels, one can identify a wrong
sign decay which is more sensitive to new physics beyond the Standard Model.Comment: 24 pages, 10 figures; minor errors and misprints corrected,
references added, version to be published in EPJ
Crucial and bicrucial permutations with respect to arithmetic monotone patterns
A pattern is a permutation, and an arithmetic occurrence of in
(another) permutation is a subsequence
of that is order isomorphic to
where the numbers form an arithmetic progression. A
permutation is -crucial if it avoids arithmetically the patterns
and but its extension to the right by any element
does not avoid arithmetically these patterns. A -crucial permutation
that cannot be extended to the left without creating an arithmetic occurrence
of or is called -bicrucial.
In this paper we prove that arbitrary long -crucial and
-bicrucial permutations exist for any . Moreover, we
show that the minimal length of a -crucial permutation is
, while the minimal length of a
-bicrucial permutation is at most ,
again for
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