[Rivet] Fwd: CMS_2013_I1265659 (color coherence effects)

[Andy Buckley]

Hi Albert,

The colour coherence analysis is now in Rivet's release branch:
https://rivet.hepforge.org/trac/browser/src/Analyses/CMS_2013_I1265659.cc

It looked good, although I've added a few missing "*GeV" to get the
units right. At the *moment* everything is in GeV, but we don't know
what's going to happen in the future and HepMC units are a mess, so it's
safest to use the units... plus it makes the physics clearer.

I've also removed a few unnecessary intermediate variables -- the
current Rivet versions provide direct access to kinematic variables from
Jet i.e. myjet.eta() which is rather nicer than myjet.momentum().eta(),
and also "automatically abs'd" versions like myjet.abseta(), absrap(),
abspid()... although there's a bug in the last of those so don't use it
until 2.1.2 is released!

Also, just a reminder to use the functions in Rivet/Math/MathUtils.hh
such as isZero(x), sign(x), inRange(x, lo, hi), etc. -- they again make
the code clearer and easier to maintain.

There were also a few LaTeX typos (missing $, etc.) in the .info file,
but nothing to get excited about.

I've run 20k Pythia8 events through the slightly refactored analysis and
it looks good... so hopefully nothing for you to check but do let us
know before release if you or the original authors spot anything
worrying :-)

Cheers,
Andy


On 12/05/14 11:51, Albert Knutsson wrote:
> 
> Hi Andy,
> 
> thanks for including CMS_2013_I1265659 in the next release.
> 
>> To allow brave users to access analysis code immediately, before it's
>> been integrated into a Rivet release, we have created a "Rivet contrib"
>> directory in the our downloads area:
> That is really good. I like that.
> 
> 
>> 2.1.2 Rivet release
>> (planned in the next week, so maybe you have some others you want to
>> send, too?) 
> 
> We have two more plugins in the pipe-line. One of them you will
> definitely receive before next week. Will try with the second also.
> 
> 
> Cheers,
> Albert
> 
> 
> On 12/05/14 11:13, Andy Buckley wrote:
>> One more comment...
>>
>> To allow brave users to access analysis code immediately, before it's
>> been integrated into a Rivet release, we have created a "Rivet contrib"
>> directory in the our downloads area:
>>
>> https://www.hepforge.org/archive/rivet/contrib/
>>
>> As the README in that directory states, the analyses in there come with
>> no guarantee, and they will be removed (at least that is the plan) when
>> a Rivet release is made which contains that analysis. But they will be
>> available immediately, which should make some people happy... and maybe
>> take some of the pressure off us to issue releases at rate of Hz.
>> Accordingly I've put your tarball in there before I even try to open it
>> myself ;-)
>>
>> I'll add a link to this area on the Rivet website and mention it in the
>> announcement message for Rivet 2.1.2 when it comes out.
>>
>> Best wishes,
>> Andy
>>
>>
>>
>> On 12/05/14 10:39, Albert Knutsson wrote:
>>> Hi Andy,
>>>
>>> here it is again. Please confirm that you got it.
>>>
>>> Cheers,
>>> Albert
>>>
>>>
>>> -------- Original Message --------
>>> Subject: 	[Rivet] CMS_2013_I1265659 (color coherence effects)
>>> Date: 	Fri, 21 Feb 2014 15:00:46 +0100
>>> From: 	Albert Knutsson <albert.knutsson at ua.ac.be>
>>> Reply-To: 	<albert.knutsson at cern.ch>
>>> To: 	Rivet <rivet at projects.hepforge.org>
>>>
>>>
>>>
>>> Hi Riveters,
>>>
>>> please find attached the CMS plugin for " Probing color coherence
>>> effects in pp collisions at sqrt(s) = 7 TeV", CMS_2013_I1265659.
>>>
>>> Thanks in advance for including it in a future release.
>>>
>>> ( Also for this plugin I got problem when overlapping bins
>>> when converting to yoda. I solve it by reduced the errors in
>>> x on the last decimal after aida2yoda. )
>>>
>>> Cheers,
>>> Albert
>>>
>>>
>>
> 


-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Glasgow / PH Dept, CERN