Hi Suvayu,
This Z' (ie. one that is discussed in the context of B0->K*mumu) would be different from a Z in that it would couple weaker to quarks than to leptons. As a result, one would produce few of them directly in a hadron collider, unfortunately...
(As far as I understood...) Cheers, Niels
On Fri, 1 May 2015, Marcel Merk wrote:
Hi Suvayu, et al,
Indeed, the Z' is hot recently as it can be related to signatures of B_s,d
--> mumu, B-->K*mumu, and R_K=(B->Kmumu/B->Kee).
As was discussed in Moriond, all of these measurements are being fitted with
a modified C9 Wilson coefficient, which would then perhaps point to New
Physics of a Z' (or leptoquarks, or perhaps even many other things).
In fact, we made a public news item on this on the Nikhef website on March
20,
In order to be consistent with other measuremnts, the mass range of such a
Z' would be in the range of 2 - 7 TeV or so. Also its couplings should be
non-standard, in particular to describe the lepton flavour vioalting R_K
ratio.
There are two events coming up:
1. Jan-Willen van Holten from Nikhef-theory is going to discuss the theory
aspects of the Z', as he was asked by the NIkhef theory community who
triggered on the Z' news. (see Jan Willem announcement)
2. Altmannshofer (one of the speakers presenting the Z' results at Moriond)
will come to Nikhef for a colloquium on the friday after our workshop. We
are thinking to organise a little workshop with Robert around this talk.
cheers,
- Marcel
On 1 May 2015 at 00:49, Suvayu Ali <ali.suvayu@nikhef.nl> wrote:
Hi Marcel, others, and Z' aficionados,
I have a question that keeps puzzling me. Am I correct in
noticing a
sudden increased interest on Z' models? This puzzles me since I
was
under the impression these models have been excluded to almost
3TeV by
direct searches! See: http://arxiv.org/abs/1405.4123 (assuming
SM
couplings). In fact, the limits were already past 1 TeV back in
2011!
Do these results somehow not apply to some LHCb results (e.g. Bs
→ μμ)?
If so, why? Are there other motivations than significantly
weaker
couplings for them to not show up in direct searches?
Just a few itches I had to scratch ...
Cheers,
PS: Do we also have a page like this?
https://twiki.cern.ch/twiki/bin/view/AtlasPublic/ExoticsPublicResults
On Thu, Apr 30, 2015 at 11:22:04PM +0200, Marcel Merk wrote:
> Dear bfys friends,
>
> You are all very welcome to join the informal lecture of Jan
Willem on Z'
> physics and the connection to right handed neutrino's....
>
> ---------- Forwarded message ----------
> From: Jan-Willem van Holten <jwvholten@gmail.com>
> Date: 30 April 2015 at 13:32
> Subject: Z' lecture
> To: theory-wide@nikhef.nl, Marcel Merk
<marcel.merk@nikhef.nl>, Bob van
> Eijk <vaneijk@nikhef.nl>
>
>
> Dear colleagues,
>
> at the request of some of our PhD/master students I will
arrange an
> informal lecture/discussion session on
> Completing the standard model with right-handed neutrinos
and Z'
>
> Time: Monday May 11, 14.00-16.00 (or how long it takes)
> Place: H331
>
> Everyone interested is welcome, basic knowledge of QFT theory
and the
> standard model will be assumed.
>
> Jan-Willem
>
>
>
> --
> Prof.dr. J.W. van Holten
>
> Theoretical Physics
> Nikhef, Amsterdam
> and Leiden University
> Netherlands
> _______________________________________________
> Bfys-group mailing list
> Bfys-group@nikhef.nl
> https://mailman.nikhef.nl/mailman/listinfo/bfys-group
--
Suvayu
Open source is the future. It sets us free.
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