Bounds on fourth generation induced lepton flavour violating double insertions in supersymmetry

Garg, Sumit K and Vempati, Sudhir K (2011) Bounds on fourth generation induced lepton flavour violating double insertions in supersymmetry. In: Physics Letters B, 702 (5). pp. 370-376.

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Abstract

We derive bounds on leptonic double mass insertions of the type delta(l)(i4)delta(l)(4j) in four generational MSSM, using the present limits on l(i) -> l(j) + gamma. Two main features distinguish the rates of these processes in MSSM4 from MSSM3: (a) tan beta is restricted to be very small less than or similar to 3 and (b) the large masses for the fourth generation leptons. In spite of small tan beta, there is an enhancement in amplitudes with LLRR (4 delta(ll)(i4)delta(rr)(4j)) type insertions which pick up the mass of the fourth generation lepton, m(tau'). We find these bounds to be at least two orders of magnitude more stringent than those in MSSM3. (C) 2011 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	Physics Letters B
Publisher:	Elsevier Science B.V.
Additional Information:	Copyright of this article belongs to Elsevier Science B.V.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	28 Sep 2011 10:48
Last Modified:	28 Sep 2011 10:48
URI:	http://eprints.iisc.ac.in/id/eprint/40774

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