[Rivet] Heavy flavour jet definition

[Alan Barr]

Hi Jon, it wasn't in fastjet the last time I looked, but that's a good point. I'll double check....

It sounds like it might be the best algorithm for b-jet definition for the e.g. the SUSY + b-jet analyses (and most likely for some SM analyses too...)

Alan

-----Original Message-----
From: Jonathan Butterworth [mailto:jmb at hep.ucl.ac.uk] 
Sent: 13 June 2011 16:38
To: rivet at projects.hepforge.org; Peter Richardson; Claire Gwenlan; Alan Barr
Subject: Re: [Rivet] Heavy flavour jet definition

Hi Alan,

Typically rivet takes jet tools from fastjet. Have you looked there?

http://www.lpthe.jussieu.fr/~salam/fastjet/

Rivet in general only contains things which have been measured, and I don't think this definition has been used in a measurement to date.

Cheers,
Jon

On 13/06/2011 16:34, Alan Barr wrote:
> Forwarded to the Rivet team, since Andy's out-of-office reply suggests he is moonlighting as a Polish theorist...
>
> -----Original Message-----
> From: Alan Barr
> Sent: 13 June 2011 16:31
> To: Andy Buckley (andy.buckley at ed.ac.uk)
> Cc: Claire Gwenlan; Peter Richardson (peter.richardson at durham.ac.uk)
> Subject: Heavy flavour jet definition
>
> Hi Andy,
>
>      As a man well connected in such things, do you happen to know of any public implementation of the infra-red safe b-jet identification algorithm described in :
> http://arxiv.org/abs/hep-ph/0601139?
>
> "Infrared safe definition of jet flavour"
> Andrea Banfi, Gavin P. Salam, Giulia Zanderighi
>
> Abstract: it is common, in both theoretical and experimental studies, to separately discuss quark and gluon jets. However, even at parton level, widely-used jet algorithms fail to provide an infrared safe way of making this distinction. We examine the origin of the problem, and propose a solution in terms of a new "flavour-kt" algorithm. As well as being of conceptual interest this can be a powerful tool when combining fixed-order calculations with multi-jet resummations and parton showers. It also has applications to studies of heavy-quark jets.
>
> It seems exactly the sort of thing that one might expect to find as a Rivet tool. But when Peter did a search he found that the b-jet definitions there are typically just dR matches to b-quarks, or checks for any b-ancestor in the event record.
>
> Alan
> _______________________________________________
> Rivet mailing list
> Rivet at projects.hepforge.org
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