[Rivet-svn] rivet: 4 new changesets

[Rivet Mercurial]

details:   https://rivet.hepforge.org/hg/rivet/rev/5ecfafbeea95
branches:  release-2-4-x
changeset: 4991:5ecfafbeea95
user:      Andy Buckley <andy at insectnation.org>
date:      Tue Feb 23 21:04:17 2016 +0000
description:
Adding CMS pseudotop analysis

details:   https://rivet.hepforge.org/hg/rivet/rev/cb9b822cdfa9
branches:  release-2-4-x
changeset: 4992:cb9b822cdfa9
user:      Andy Buckley <andy at insectnation.org>
date:      Tue Feb 23 21:48:50 2016 +0000
description:
Merge PseudoJet code locally into CMS analysis, and revert C++11 features for now -- compiles

details:   https://rivet.hepforge.org/hg/rivet/rev/f8c1b2db0097
branches:  release-2-4-x
changeset: 4993:f8c1b2db0097
user:      Andy Buckley <andy at insectnation.org>
date:      Tue Feb 23 21:50:42 2016 +0000
description:
DOS -> Unix newline normalisation

details:   https://rivet.hepforge.org/hg/rivet/rev/70169c1556bd
branches:  release-2-4-x
changeset: 4994:70169c1556bd
user:      Andy Buckley <andy at insectnation.org>
date:      Tue Feb 23 21:54:30 2016 +0000
description:
Hide analysis prep directory

diffs (truncated from 1610 to 50 lines):

--- a/.hgignore	Tue Feb 23 17:08:18 2016 +0000
+++ b/.hgignore	Tue Feb 23 21:54:30 2016 +0000
@@ -67,3 +67,4 @@
 ^a\.out\.dSYM$
 ^Rivet-.\..\..$
 ^local/.*$
+^analyses\d\d\d$
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/data/anainfo/CMS_2015_I1370682.info	Tue Feb 23 21:54:30 2016 +0000
@@ -0,0 +1,71 @@
+Name: CMS_2015_I1370682
+Year: 2015
+Summary: Comparisons of Theory Predictions for the ttbar Process with Data from pp Collisions at $\sqrt{s}$ = 8 TeV
+Experiment: CMS
+Collider: LHC
+InspireID: 1370682
+Status: VALIDATED
+Authors:
+ - Javier Fernandez <Javier.Fernandez at cern.ch>
+ - Jungwan John Goh <Junghwan.Goh at cern.ch>	
+ - Efe Yazgan <efe.yazgan at cern.ch>	
+ - Markus Seidel <markus.seidel at cern.ch>	
+ - James Keaveney <james.keaveney at vub.ac.be>	
+ - Elvire Bouvier <e.bouvier at cern.ch>	
+ - Benedikt Maier <benedikt.maier at cern.ch>	
+References:
+ - Eur.Phys.J. C75 (2015) 542: For the analysis
+ - CMS-PAS-TOP-15-011 : For details about the Rivet implementation
+RunInfo:
+  pp QCD interactions at $\sqrt{s} = 8$ TeV. Data collected by CMS during the year 2012.
+Luminosity: 19.7 /fb
+Beams: [p+, p+]
+Energies: [8000]
+Description:
+	'The reconstruction of particle-level top quarks and anti-quarks is implemented in this module. Measurements at $sqrt{s} = 8 TeV are based on parton-level information in the full phase space using MADGRAPH+PYTHIA6. To match the particle-level top quark distributions to the measurements unfolded to the parton-level, a correction function to the particle-level distributions, derived using the same MADGRAPH+PYTHIA6 configuration that was used for the original measurement of the data points, ias applied.  Using the same MC configuration as used for the unfolding to correct back the parton-level to particle-level,  the model dependence introduced in unfolding to parton-level and extrapolating the measurement to the full phase space is eliminated.
+
+In this analysis, the particle-level top quark is defined using the following particle definitions:
+\begin{itemize}
+\item{Dressed lepton} : An object constructed by applying the anti-$k_{T}$ jet clustering~\cite{antikt} with a distance parameter of $R=0.1$ to the collection of final state electrons, muons and photons that do not originate from hadron decays. 
+The clustered objects that pass the acceptance cuts (\pt $> 20$ GeV and $|\eta| < 2.4$) are considered.
+\item{Prompt neutrino} : A neutrino that does not originate from a hadronic decay. 
+\item{Ghost B hadron} : A weakly decaying hadron with B flavor and its decay products are selected. 
+Since both the B hadron and its decay products are included, the momenta of the B hadron is rescaled by a very small factor ($10^{-20}$) to be used in the jet clustering. This avoids double-counting, but retains information about the origin of the decay products. 
+\item{Jet} : A jet is constructed applying the anti-$k_{T}$ jet clustering algorithm with a distance parameter of $R=0.5$ to the collection of all particles except neutrinos and constituents of dressed leptons. For the generator level b-jet finding, ghost B hadrons are also added to the jet clustering. Jets are required to pass acceptance cuts of \pt$ > 30$ GeV and $|\eta| < 2.4$.
+\item{b-jets} : b-quark jets are defined as the jets with a Ghost B hadron among their constituents.
+\end{itemize}
+
+Based on the particle-level objects defined above, W bosons and top quarks are reconstructed using W boson and top quark mass constraints, respectively, as described below:  
+\begin{itemize}
+\item{particle-level W boson pair} : Combinations of dressed lepton and prompt neutrinos are made to reconstruct the particle-level $W$ boson candidate that decays to a lepton-neutrino pair. The same is done with jets without B hadrons to reconstruct the $W$ boson decaying hadronically.