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 The ValenciaJetAlgorithm FastJet contrib was written and is maintained and developed by: Ignacio Garcia Garcia, Marcel Vos, IFIC (UVEG/CSIC) Valencia, Spain
+The ValenciaPlugin FastJet contrib was written and is maintained and developed by: Ignacio Garcia Garcia, Marcel Vos, IFIC (UVEG/CSIC) Valencia, Spain
+Acknowledging suggestions by Gavin P. Salam (CERN) and J. Thaler (MIT)
+The first incarnation of the Valencia algorithm (with two parameters R and beta) was proposed "A robust jet reconstruction algorithm for high-energy lepton colliders", PLB 750 (2015) 95-99, arXiv:1404.4294
+The authors acknowledge suggestions by Gavin P. Salam (CERN) and his help in assessing the IR safety of the algorithm
 A preprint motivating the algorithm and describing its performance is available on: "A new jet algorithm for lepton colliders", arXiv:1404.4294 (submitted to PLB)
+The VLC algorithm (with three parameters R, beta and gamma) is described in "Jet reconstruction at high-energy electron-positron colliders", EPJC 78 (2018) no. 2, 144. The addition of the gamma parameter was suggested by J. Thaler (MIT). The performance of the algorithm is evaluated in detail in this paper, in collaboration with Ph. Roloff, R. Simoniello (CERN) and M. Boronat, J. Fuster (IFIC)
 Please contact: marcel.vos@ific.uv.es for questions, queries and comments

external/fastjet/contribs/ValenciaPlugin/ChangeLog

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+-12-2018: Gavin Salam <gavin.salam@cern.ch>
+        * VERSION:
+        * NEWS:
+        updated version to 2.0.2
+-12-18: Marcel Vos <marcel.vos@ific.uv.es>a
+        * ValenciaPlugin.cc:
+        Incorporates a modification suggested by
+        Filip Zarnecki (Warsaw) to make sure the behaviour for negative
+        beta is correct (added to trunk in june 2017 but left out of
+.0.1)
+-12-04: Marcel Vos <marcel.vos@ific.uv.es>
+        * VERSION
+        * NEWS
+        updated version to 2.0.1
+        * ValenciaPlugin.cc:
+        Bug fix: a bug was discovered in the plugin by Matthias Weber (CERN)
+        the calculation of the distance diB assumed massless constituents.
+        The impact on the results - jet energy and mass - is typically small,
+        but can be non-negligible
 -02-2015  Marcel Vos <marcel.vos@ific.uv.es>

r769f65b	r45e58be
	1	22 December 2018: bug-fix release 2.0.2, for negative beta
	2	04 December 2018: bug-fix release 2.0.1, for massive constituents
1	3	24 February 2015: version 2.0.0
2	4	21 February 2015: released 2.0-devel

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 // $Id: ValenciaPlugin.cc 776 2015-02-24 17:53:27Z vos $
+// $Id: ValenciaPlugin.cc 1209 2018-12-05 16:18:01Z vos $
 //
 // Copyright (c) 2014, Marcel Vos and Ignacio Garcia
 …
     // E-to-the-2*beta times sin(polar angle)-to-the-2*gamma
     if (E==0. || jet.perp()==0.) diB=0.;
+    diB = pow(E,2*beta) * pow(jet.perp()/E,2*info->gamma());
+    // modified diB in release 2.0.1
+    diB = pow(E,2*beta) * pow(jet.perp()/sqrt(jet.perp2()+jet.pz()*jet.pz()),2*info->gamma());
+  }
 …
                    - nz*jet->nz;
     if (jet->E < E)
+    if (pow(jet->E,2*beta) < pow(E,2*beta))
       dij *= 2 * pow(jet->E,2*beta);
     else

r769f65b	r45e58be
1		// $Id: ValenciaPlugin.hh 77~~6 2015-02-24 17:53:2~~7Z vos $
	1	// $Id: ValenciaPlugin.hh 771 2015-02-21 16:40:07Z vos $
2	2	//
3	3	// Copyright (c) 2014, Marcel Vos and Ignacio Garcia

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