Hi Ashutosh,

     I agree it is very impressive. It is the kind of thing I intend to work on at LHC 14 TeV.
Hopefully nature is kind enough for the masses to be in the regions below the lines!

A central question (especiially for e+e-) is whether facilities can pair produce detectable next-to-lightest
supersymmetric particle pairs. For e+e- it is hard to evade sensitivity up to the beam energy
and chargino pairs are arguably the most relevant.
Whenever we produced these plots at LEP we had the m_LSP = m_NLSP line superimposed,
and the narrow corridor between them at about delta_M =2-3 GeV which was not
accessible in the standard searches was obvious to the reader. That is not the case in the ATLAS plot.

In general most SUSY talks do not adequately explain the caveats or even methods associated with
the various plots. I am not trying to shoot inwards, I am trying to understand what are the
reasonable scientific conclusions from the proposed programs. A reference to the
study/white paper would also help.

            regards
                Graham

On 8/5/2013 2:14 PM, Ashutosh Kotwal wrote:

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Slide 50. This seems impressive (electroweakinos at LHC), but without a full understanding of the caveats / model assumptions /

statement that the low delta_M region is not accessible, it can be extremely misleading.

A throw-away naive implication is that LHC has the capability to rule out charginos to 800 GeV in mass, whereas my

interpretation of the plot is that there is no model independent exclusion of charginos much beyond that

achieved at LEP2 feasible from LHC.

Hi Graham

I guess I disagree strongly with you on this

The HL LHC sensitivity is really impressive for electroweakino production. The plot is two dimensional already and shows the validity in terms of LSP mass

There is no experiment that can do everything

It is pointless to argue about what one experiment CANNOT do and what another CAN do in the same breath UNLESS the conjugate of both is also stated (and that's the beginning of an inward shooting match which is a bad idea)

Ashutosh

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-- 
Graham W. Wilson
Associate Professor
Dept. of Physics and Astronomy
University of Kansas
Lawrence, KS 66045
Office Tel.   785-864-5231
Web: http://heplx3.phsx.ku.edu/~graham/

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