NNbetween 00 and 99, that demonstrates the claimed bug. Feel free to use some of the existing sample main programs
mymainNN.ccprogram in the
share/Pythia8/examplessubdirectory and run it from there (
make mymainNNfollowed by
If you don't know whom to send the bug report to, then use the generic address firstname.lastname@example.org.
For special topics it may be faster to contact the PYTHIA person(s) most directly involved in this field. Here is a brief list of specialities
|Christian Bierlichemail@example.com||rope hadronization and string shoving; heavy-ion collisions; ALICE matters|
|Nishita Desaifirstname.lastname@example.org||SUSY, SLHA, BSM|
|Ilkka Heleniusemail@example.com||photoproduction, gamma-gamma|
|Philip Iltenfirstname.lastname@example.org||taus, onia, configure and Makefile; LHCb matters|
|Leif Lönnblademail@example.com||heavy-ion collisions (pA and AA)|
|Stephen Mrennafirstname.lastname@example.org||SUSY, BSM, matching and merging; CMS matters|
|Stefan Prestelemail@example.com||matching and merging, also to NLO; DIRE parton shower; ATLAS matters|
|Torbjörn Sjöstrandfirstname.lastname@example.org||SM processes, parton showers, MPIs, colour reconnection, hadronization, core structure and utilities|
|Peter Skandsemail@example.com||SLHA, parton showers, MPIs, colour reconnection, hadronization, tuning; VINCIA|
Do note that the major collaborations, such as ATLAS and CMS, have their own Monte Carlo support groups, with a lot of experience in solving typical issues, many of which are related to the setups and interfaces created inside the collaborations. If you are a member of a major collaboration you should always turn to these groups in the first place, and only turn to us when it has been confirmed as a true problem going beyond the local installation.
You may also direct PYTHIA-related questions to us, following the same pattern as above, but note that manpower is limited, so focus on topics that do require our expertise. We cannot act as teachers of particle physics in a broader sense, however. If you are a PhD student it is the task of your supervisor to see to it that you are offered the particle physics courses you need, and to answer all general questions you may have. Summer schools can offer a most useful complement to the basic courses at you local university. In particular we would like to mention the MCnet annual Monte Carlo school for general information on the physics and usage of event generators, and the CTEQ annual summer school on QCD analysis and phenomenology.
To be successful, a contribution must not only introduce useful
new functionality but also be written in a form that fits nicely into
the existing PYTHIA framework. The
CODINGSTYLE file in
the PYTHIA distribution explains how to achieve clean and uniform
Feel free to consult beforehand whether a specific contribution would be welcome, so you don't waste time on something that e.g. may already be under way, or that may not fit so well. This in particular is the case if linking to external libraries are involved, since fitting a new library into the PYTHIA build procedure can be a rather delicate process, not always worth the bother.
For PhD students specifically, we offer MCnet-funded studentships of 3 - 6 months, during which you may come to Lund (or some other MCnet node) to work on a short project involving Monte Carlo event generators. This could be the implementation of a new feature into PYTHIA, the use of PYTHIA in a new context, or something else. You must have an idea yourself what you would like to work on, that preferably also would be beneficial for your PhD studies, and have the support of your thesis supervisor. See montecarlonet.org for more information how to apply!