------------------------------------------------------------------- ========================================================== Geant4 - an Object-Oriented Toolkit for Physics Simulation ========================================================== History file for hadronic/models/parton_string/hadronization directory ------------------------------------------------------------- This file should be used to summarize modifications introduced in the code and to keep track of all tags. --------------------------------------------------------------- * Please list in reverse chronological order (last date on top) --------------------------------------------------------------- 20-Nov-2018 A. Ribon (had-hadronization-V10-04-07) - Corrected only the History file (no other changes). 20-Nov-2018 A. Ribon (had-hadronization-V10-04-06) - Minor clean-up and indentation: no changes in the random sequence. 26-Oct-2018 V. Uzhinsky (had-hadronization-V10-04-05) - G4LundStringFragmentation : tuning of strange - anti-strange probability production as a function of energy to describe NA61/SHINE 31 GeV/c p-C data on K+ / K- production. Decreased also the Lambda0 production for NA61/SHINE 158 GeV/c and 31 GeV/c p-C : for the former good agreement, while for the latter the simulation underestimates the data. - G4QGSMFragmentation : new algorithm for last string decay a-la Lund is implemented. Improved the algorithm to stop the fragmentation. Tuning of parameters with NA49 and NA61/SHINE data was performed. 04-Oct-2018 A. Ribon (had-hadronization-V10-04-04) - Coverity fix and general clean-up: no changes in the physics, nor to the random sequence. 18-Jan-2018 A. Ribon (had-hadronization-V10-04-03) - G4VLongitudinalStringDecay : removed useless caching in the method FragmentationMass which was causing rare irreproducibilities in gamma-nuclear reactions (i.e. involving QGS). 19-Dec-2017 V. Uzhinsky (had-hadronization-V10-04-02) - Fine tuning of LUND and QGS fragmentations. 14-Dec-2017 V. Uzhinsky (had-hadronization-V10-04-01) - Improved versions of LUND and QGS fragmentations. 07-Dec-2017 A. Ribon (had-hadronization-V10-04-00) - Brought back the development version of hadronization (as it was in had-hadronization-V10-03-07). 27-Oct-2017 A. Ribon (had-hadronization-V10-03-09) - G4ExcitedStringDecay : introduced smearing of resonance masses (as requested by the PANDA Collaboration). - G4LundStringFragmentation : a dependence of on S is introduced only for AntiP P annihilations. 26-Oct-2017 A. Ribon (had-hadronization-V10-03-08) - Brought back the stable, production hadronization (as in 10.3 and 10.2). 24-Oct-2017 V. Uzhinsky (had-hadronization-V10-03-07) - A dependence of on S is introduced for AntiP P annihilations. It can reflect on other interactions. 19-Jul-2017 V. Uzhinsky (had-hadronization-V10-03-06) - G4ExcitedStringDecay.cc Smearing of resonance masses is introduced. - G4LundStringFragmentation.cc Some bugs are fixed left after implementation of the rotating strings. 09-Mar-2017 A. Ribon (had-hadronization-V10-03-05) - G4LundStringFragmentation : fixed memory leaks. 10-Feb-2017 V. Uzhinsky (had-hadronization-V10-03-04) - First implementation of rotating strings with introduction of Mt distribution of hadrons. Changes are in G4LundSyringFragmentation.cc and .hh G4FragmentingString.hh G4LongitudinalStringDecay.hh Parameters are tuned using NA49 exp. data on pp-interactions. Good results are obtained for Pi+-, K+-. For P and Pbar - xF correlations are not quite well. 13-Jan-2017 V. Uzhinsky (had-hadronization-V10-03-03) - Re-organized and cleaned G4LUNDStringFragmentatio. The variant is tuned using NA49 exp. data on pp->p/pi/K +X. 14-Dec-2016 A. Ribon (had-hadronization-V10-03-02) - After the release G4 10.3, with "stable" version, this tag brings back the "development" version, similar (although not identical because of some code clean-up and the (internal) tag had-hadronization-V10-03-00, see below) to G4 10.2.ref10. (Please note that the changes in G4LundStringFragmentation.cc of the (internal) tag had-hadronization-V10-03-01 have been excluded in the present tag, in order to test one change at the time.) 30-Nov-2016 V. Uzhinsky (had-hadronization-V10-03-01) G4LundStringFragmentation.cc - Mt distribution for produced hadrons was introduced. 9-Nov-2016 A. Ribon (had-hadronization-V10-03-00) G4ExcitedStringDecay : increased the number of max attempts to fragment strings from 10 to 100. 8-Sep-2016 V. Uzhinsky (had-hadronization-V10-02-14) Clearing of LUNDstringFragmentation. Bugs are fixed. 7-Sep-2016 A. Ribon (had-hadronization-V10-02-13) Created tag on branch of 10.2.ref07 to fix a bug on the method G4ExcitedStringDecay::FragmentStrings . Note that this bug has been already fixed in the trunk. 20-July-2016 A. Ribon (had-hadronization-V10-02-12) G4LundStringFragmentation: V.U. erased the warring messages from the previous tag. 19-July-2016 V. Uzhinsky (had-hadronization-V10-02-11) G4LundStringFragmentation: Method SetMinimalStringMass was essential improved. Energy-momentum conservation was restored for processes with Delta-isobar production. 30-June-2016 V. Uzhinsky (had-hadronization-V10-02-10) One more misprint was found in G3LundStringFragmentaion.cc MinStringMass method. 29-June-2016 V. Uzhinsky (had-hadronization-V10-02-09) Alberto found a misstype in the previous G3LundStringFragmentaion.cc The tag will be redone. 29-June-2016 V. Uzhinsky (had-hadronization-V10-02-08) The method of G4VLongitudinalStringDecay::Splitup was transferd to FTF and QGS model because now the treat differently Delta isobars. 27-June-2016 V. Uzhinsky (had-hadronization-V10-02-07) G4LundStringFragmentation.cc algorithm was improved. Fragmentation is made a'la LUND fragmentation. 13-June-2016 V. Uzhinsky (had-hadronization-V10-02-06) G4LundStringFragmentation::Sample4Momentum() was improved. Average transvers momentum is set to 475 MeV for mesons and baryons, and for barion 3/2 production - 800 MeV/c. G4LundStringFragmentation::GetLightConeZ - alund=0.233 GeV^2 for strange meson produced by a quark, and alund=0.175 GeV^2 for q->baryon. di-quark fragmentation function into baryon (1/2) z^1.5, and z^(-0.25) for baryon (3/2). Note: the tag was made accidentally in the wrong directory (src/). 6-June-2016 V. Uzhinsky (had-hadronization-V10-02-05) Re-tag of previouse tag. Compilation warning is erased. 4-June-2016 V. Uzhinsky (had-hadronization-V10-02-04) A solution of the baryon puzzle of NA49 data has been found! of baryons 1/2 at a string fragmentation is setting up at 435 MeV/c, and for barion 3/2 production - 900 MeV/c. 1-June-2016 V. Uzhinsky (had-hadronization-V10-02-03) Fine tuning of G4LundStringFragmentation.cc. of mesons created at quark fragmentation is decreased. of baryons created at quark and diquark is increased. Fragmentation functions of qq-> B(1/2) and B(3/2) are implemented correctly. 28-May-2016 V. Uzhinsky (had-hadronization-V10-02-02) is increased in 2 times in G4LundStringFragmentation.cc. It is very important for a description of NA49 exp. data on pp-interactions at 158 GeV/c, especially for xF and Pt distributions. 23-May-2016 V. Uzhinsky (had-hadronization-V10-02-01) Di-quark fragmentation into baryons is improved in LUND string fragmentation. Description of NA49 and NA61/SHINE exp. data on p+p->p+X is improved. 12-May-2016 V. Uzhinsky (had-hadronization-V10-02-00) - G4LundStringFragmentation.cc, the method SetMinimalStringMass was improved which is important for Pbar P annihilation. 13-Aug-2015 A. Ribon (had-hadronization-V10-01-09) - G4QGSMFragmentation, G4FragmentingString : Coverity fix. 7-Aug-2015 A. Ribon (had-hadronization-V10-01-08) - G4LundStringFragmentation, G4QGSMFragmentation, G4ExcitedStringDecay and G4VKinkyStringDecay : checking of 'while' loops. 5-Aug-2015 A. Ribon (had-hadronization-V10-01-07) - G4VLongitudinalStringDecay, G4LundStringFragmentation, G4QGSMFragmentation: replaced std::exp, std::log and std::pow with the faster G4Exp, G4Log and G4Pow, respectively. This changes the random number sequence. 5-June-2015 V. Uzhinsky (had-hadronization-V10-01-06) - A mistake was erased in G4QGSMFragmentation::SplitEandP. FragmentationMass(NewString,&G4HadronBuilder::BuildLowSpin) -> FragmentationMass(NewString,&G4HadronBuilder::Build)! 4-June-2015 V. Uzhinsky (had-hadronization-V10-01-05) - G4QGSMFragmentation::SplitEandP a bug is fixed which led to energy-momentum non-conservation quite rare. FragmentationMass(NewString,&G4HadronBuilder::BuildHighSpin); was changed into FragmentationMass(NewString,&G4HadronBuilder::BuildLowSpin); See Uzhi 03.06.2014 2-June-2015 V. Uzhinsky (had-hadronization-V10-01-04) - G4ExcitedStringDecay.cc - a very serious bug was found. It led to energy-momentum non-conservation at QGSM application. I am afraid that it can have influence on FTF model hadronization. 29-May-2015 V. Uzhinsky (had-hadronization-V10-01-03) - G4LundStringFragmentation - a bug led to FPE is erased. It was in G4LundStringFragmentation::FragmentString -- if(!IsFragmentable(&aString)) // produce 1 hadron was applied to qq- anti_qq string with mass 1951 MeV, and there was an attempt to produce 2 baryons without of a checking baryon masses. I am afraid that it was presented before. Now it is: if(!aString.FourQuarkString() && !IsFragmentable(&aString)). 25-May-2015 V. Uzhinsky (had-hadronization-V10-01-02) - G4LundStringFragmentation - Parameters are tuned for a description of NA49 data. 26-Mar-2015 A. Ribon (had-hadronization-V10-01-01) - G4LundStringFragmentation - changes introduced by V. Uzhinsky to improve the reaction cross sections of: Pbar + P -> Pi+Pi-, K+K- 21-Jan-2015 A. Ribon (had-hadronization-V10-01-00) - G4LundStringFragmentation - re-introduced M.Novak's fix, replacing "if(StringMass >= ...)" with "if(StringMass > ...)" in three places. 28-Nov-2014 V. Uzhinsky (had-hadronization-V10-00-13) - G4LundStringFragmentation - charged baryon number conservation is fixed for K-nucleus interactions 6-Nov-2014 V. Uzhinsky (had-hadronization-V10-00-12) - Warning message is erased. 5-Nov-2014 V. Uzhinsky (had-hadronization-V10-00-11) - Redoing tag had-hadronization-V10-00-10 because it was done in src directory instead of top directory - hadronization. 3-Nov-2014 V. Uzhinsky (had-hadronization-V10-00-10) - G4ExcitedStringDecay.cc Restoration of the initial string system is addded for a correct repeatition of calculations in the case when hadronization is fault. - G4LundStringFragmentation.cc Fragmentation functions for qq -> B are set as f(z)~ Const for all baryons. 20-Oct-2014 A.Ribon (had-hadronization-V10-00-09) - G4VLongitudinalStringDecay.cc : mixing between the vector mesons rho0 and omega have been changed from 50% (rho0) - 50% (omega) to 100% (rho0) - 0% (omega), in order to reduce the pi0 production. Expected little effects in thin-target, and significant effects in hadronic showers in calorimeters. 15-Oct-2014 V.Uzhinsky (had-hadronization-V10-00-08) - Essential improvement of QGS hadronization. Fragmentation functions of quarks and di-quarks are closed to Kaidalov's and Shabelskii's ones. G4QGSMFragmentation::GetLightConeZ was almost re-written. Ionk algorithm is inserted for sampling light-cone momentum fraction, z. Parameters of the fragmentation were tuned. They will be improved after a revision of the QGSM string creation algorithm. - The algorith of G4QGSMFragmentation::SplitEandP was improved. It is faster now. 29-Sep-2014, V.Uzhinsky (had-hadronization-V10-00-07) - Essential improvement of hadronization. - Parameters and string fragmentation functions of G4LundStringFragmentation.cc were tuned, assuming that the weight of uu-diquarks in protons is 1/6. - Threatment of string decay direction was improved in G4FragmentingString.cc and G4LundStringFragmentation.cc - EnergyAndMomentumCorrector was improved in G4ExcitedStringDecay.cc - The method DiQuarkSplitUp in G4VLongitudinalStringDecay.cc is turned to virtual, and the corresponding methods were introduced in G4LundStringFragmentation.cc and G4QGSMFragmentation.cc - Debugging possibilities are improved. 04-Jul-2014, A.Ribon (had-hadronization-V10-00-06) - G4LundStringFragmentation.cc : brought back the Sample4Momentum method as it was before to avoid crashes. 02-Jul-2014, A.Ribon (had-hadronization-V10-00-05) - G4ExcitedStringDecay.cc and G4LundStringFragmentation.cc : minor clean-up of the previous, internal two tags, and propose for testing. 30-May-2014, V.Uzhinsky (had-hadronization-V10-00-04) - Bug is fixed in G4LundStringFragmentation.cc for anti-diquark-diquark strings. - Anisotropic decay is only left in G4LundStringFragmentation::Sample4Momentum for a sampling of momenta of 2 last produced hadrons for all strings. Before this, quark-diquark strings were decayed isotropically. It is improve a little bit proton spectra. 25-May-2014, V. Uzhinsky (had-hadronization-V10-00-03) - Parameters of G4LundStringFragmentation.cc were re-tuned. Fragmentation function F(qq->B+anti-quark) was set to Z^2. 22-May-2014, A.Ribon (had-hadronization-V10-00-02) - Applied Coverity's suggestion to check that the vector index NumberOf_FS in G4LundStringFragmentation.cc does not exceed the allowed range. 12-May-2014, A.Ribon (had-hadronization-V10-00-01) - Applied Vladimir Uzhinsky's bug-fix on the positions of the increment of the variables "StateQ++" and "StateAQ" in G4LundStringFragmentation.cc. 24-Apr-2014, A.Ribon (had-hadronization-V10-00-00) - Applied Novak's bug fix in G4LundStringFragmentation.cc : replacing ">=" with ">" in three if statements, which caused crashes in the case of anti_sigma+ capture at rest on hydrogen. 14-Nov-2013, A.Ribon (had-hadronization-V09-06-02) - Fixed two mistakes in the index manipulation of the BaryonWeight 4-dimensional vector in G4LundStringFragmentation.cc . 29-July-2013, H.Kurashige (had-hadronization-V09-06-01) - Remove inclusion of G4ShortLivedTable.hh (G4VLongitudinalStringDecay.cc) 02-May-2013, A.Ribon (had-hadronization-V09-06-00) - For thread safety, replaced CLHEP::RandFlat with G4RandFlat in G4VLongitudinalStringDecay.cc. 27-Sep-2012, G.Cosmo - Explicitly use inclusion of headers for system of units and physical constants, in plan to remove implicit inclusion from globals.hh. 13-Aug-2012, A.Ribon (had-hadronization-V09-05-06) - Fixed compilation error in G4ExcitedStringDecay.cc when the constructor of the Lorentz vector is made explicit. 25-Jul-2012, G.Folger (had-hadronization-V09-05-05) - Fixes for coverity in G4LundStringFragmentation.cc . 17-Jul-2012, G.Folger (had-hadronization-V09-05-04) - fixes for coverity in G4FragmentingString and G4VLongitudinalStringDecay 12-Jun-2012, G.Folger (had-hadronization-V09-05-03) - fix warnings on shadowed variables, affected G4LundStringFragmentation.cc 25-May-2012, G.Folger (had-hadronization-V09-05-02) - make copy ctor, =, == , and != operators private without implementation, fixing coverity warnings 21 May 2012, Vladimir Uzhinsky (had-hadronization-V09-05-01) - Probabilities of s-sbar quark pairs and qq-qqbar diquark pairs are changed in G4LundStringFragmentation for a description of the NA49 collaboration data. 12-Apr-2012, G.Folger (had-hadronization-V09-05-00) - Changes in debugging information in src/G4ExcitedStringDecay.cc 08 Nov 2011, Alberto Ribon (had-hadronization-V09-04-03) - Tagged the improvements in the code structure of the class G4LundStringFragmentation. Results remain exactly the same as before these code improvements. 08 Nov 2011, Alberto Ribon, svn rev 54374 - Factorized the method G4LundStringFragmentation::FragmentString to make the code easier to understand and maintain. Also put at the end of the .cc file all newly added methods. 04 Nov 2011, Alberto Ribon, svn rev 54124 - Factorized the method G4LundStringFragmentation::SplitLast to make the code easier to understand and maintain. 02 Nov 2011, Alberto Ribon, svn rev 53955 - Made public the virtual method G4LundStringFragmentation::FragmentString. Clean up also old commented lines in two G4LundStringFragmentation methods: StopFragmenting and FragmentString. 1 Nov 2011, Gunter Folger, svn rev 53895 - G4LundStringFragmentation: simplify GetLightConeZ() 29 Sep 2011, Gunter Folger, svn rev 52604 - G4LundStringFragmentation: Cleanup indentation 19 Jul 2011, Gunter Folger (had-hadronization-V09-04-02) - Correct mistake in tagging made for had-hadronization-V09-04-00/01 19 Jul 2011, Gunter Folger bad tag (had-hadronization-V09-04-00) - Address coverity warnings. One outstanding warning in G4LundStringFragmentation::Splitlast(). 3 Nov 2010, Gunter Folger (had-hadronization-V09-03-02) - fix minor coverity warnings in G4HadronBuilder 22-September-2010 V. Uzhinsky (had-hadronization-V09-03-01) -------------------------------------------------------------- - Warning messages are erased in G4LundStringFragmentation.cc 20-September-2010 V. Uzhinsky ------------------------------ - Phase space restrictions are introduced at small mass string fragmentation. 5-August-2010 V. Uzhinsky -------------------------- - Small re-organization is done in G4ExcitedStringDecay.hh. Inline methods were moved to G4ExcitedStringDecay.cc. - An action is introduced in FragmentStrings. It acts when EnergyAndMomentumCorrector can not be done due to large sum masses of produced hadrons. This led to energy-momentum violation. Now string fragmentation is repeted 100 times in a bad case. 21-June-2010 V. Uzhinsky (had-hadronization-V09-03-00) -------------------------------------------------------------- - Lund string fragmentation is improved. The inselfconsistency between LightFragmentationTest and Lund fragmentation is erased. Energy conservation in FTF is recovered. 6-December-2010 V. Uzhinsky, (had-hadronization-V09-02-04) -------------------------------------------------------------- - Lund string fragm. improved, start fragmentation. 17-July-2009 V. Uzhinsky (had-hadronization-V09-02-03) -------------------------------------------------------------- - Some small optimization are done. 9-July-2009 V. Uzhinsky (had-hadronization-V09-02-02) -------------------------------------------------------------- - Bug was fixed in G4VLongitudinalStringDecay.cc at calculation of formation/creation time, c_light was inserted. - String tension parameter was set to the usual value (1 GeV/fm) in G4LundStringFragmentation.cc 22-May-2009 Gunter Folger (had-hadronization-V09-02-01) -------------------------------------------------------------- - remove temporary workaround - fix is now in QGS - change pt sampling in G4LundStringFragmentation to avoid near endless loop; this should improve overall performance slightly. Affected G4VLongitudinalStringDecay, where SampleQuarkPt() is implemented; affected .hh and .cc for new optional argument of max Pt to SampleQuarkPt() 18-May-2009 Gunter Folger (had-hadronization-V09-02-00) --------------------------------------------------------------------- - reset formatting changes by MK with tags hadr-prtn-hadr-V09-02-xx - temporary workaround for wrong PDG codes created on wrong input from QGS when used for e.g. antiproton. 2-May 2007 Gunter Folger (had-hadronization-V08-02-03) --------------------------------------------------------------------- - G4ExcitedStringDecay.hh: protect againt divide by 0 when KTsum1.e() is 0. 24-April 2007 Gunter Folger (had-hadronization-V08-02-02) --------------------------------------------------------------------- - Seperate FTF and QGS fragmentation dir methods where V.Uzhinsky modified the algorithm for FTF. 2-March 2007 Gunter Folger (had-hadronization-V08-02-01) --------------------------------------------------------------------- - G4ExcitedStringDecay::EnergyAndMomentumCorrector no longer causes Exception when no converging. Add more info when failing. Return correct status. 24-Jan 2007 Gunter Folger (had-hadronization-V08-02-00) -------------------------------------------------------------- - G4ExcitedStringDecay::EnergyAndMomentumCorrector : Correct bug which did stop correction even if not yet converged; check on convergence must check that scale-1 is close to 0, and not less than 0 26-May 2006 Gunter Folger -------------------------------------------------------------- - Fix ( finally?) the charge check in G4HadronBuilder.cc