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I'm interested in Sarahs ability to connect to other tools. Could you demonstrate (say with SM+singlet or MSSM) a case where you write a calchep and micromegas file using SARAH?FlorianSlide 3
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In CalcHEP there's a switch for the unitarity gauge. Just wonder what are the real examples where one specific gauge should be picked over the other
Alexander Belyaev/ Alexander Pukhov
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You can link feynarts formcalc and looptools like this << FeynArts` << FormCalc.m Install["LoopTools"] is there a problem linking other programs like feyncalc feynrules etc and how do you do it - There are some subtleties when loading packages together, mostly namespace issues (identical symbol and context names), and these are not restricted to Mathematica, either. FeynArts, FormCalc, and LoopTools come from the same author, hence it is easier to coordinate the combined loading into Mathematica. I have two solutions for this: 1) if you use the scripting method I explained in the lecture on Mathematica and FORM, you can run FeynArts in its own Mathematica session and then FeynCalc in its own (all in the same script) and they naturally don't conflict, 2) if you insist on working in the Frontend you could try launching parallel kernels and loading FeynArts in one Kernel and FeynCalc in another. I don't have cut-and-paste code for this right now but it should be reasonably easy to figure out, maybe something like LaunchKernels[]; ParallelEvaluate[ If[$KernelID == 1, << FeynArts`, << FeynCalc`] ].Thomas Hahn
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What is the best way to parallelize MicrOMEGAs calculations on cluster?
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When I calculate the running of SM higgs quartic coupling it runs negative around 10^-4 when using best fit parameter values. This is well below other calculations. Any understanding why? How do i improve thisFlorianSlide 4
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What would be the easiest way to pass CalcHEP events to PYTHIA and then to Delphes?
Alexander Belyaev/ Alexander Pukhov
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Can Sarah be linked with the new program flavio? If so how?FlorianSlide 5
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CalcHEP can do symbolic calculations of the squared matrix element. Can it calculate the symbolic cross section as well?
Alexander Belyaev/ Alexander Pukhov
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How does Sarah ensure you have the deepest minimum if you have many scalar fieldsFlorianSlide 6
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If I just wanted to change the photon spectrum in the background but didnt want to add a new particle and keep everything else the same (SM like) how would i do that/Douglas scott
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can calchep handle higgs to gamma gamma and other loop decays relevent for higgs signal strengths
Alexander Belyaev/ Alexander Pukhov
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Do I undestand correctly that vevacious needs only tree-level tadpole equations as an input? Does it cope with the fact that those equations also obtain corrections at one-loop level?
Florian Staub or sb. else
Slide 7
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How does Sarah handle gauge invariance for 1 loop corrections to the effective potentialFlorianSlide 8
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For which problems would one use GAMBIT and for which would CheckMATE do better?
Answer from the GAMBIT side: GAMBIT is a tool for calculating a composite likelihood based on a range of observables, collider and otherwise, and designed for scans over large parameter spaces. CheckMATE is a more focused tool for collider searches. GAMBIT contains tools for collider recasts as well, but with more of a focus on speed (because of the large parameter spaces we are considering) and fewer analyses implemented at the moment (but we are working on adding more!)
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Can you calculate STU in SARAH? (EW oblique parameters)FlorianSlide 9
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are there mathematica wrappers for any of the non-mathematica programs (micromegas, gambit etc)allNot sure if this is what you are looking for: Slide 11
With GAMBIT, we actually have the opposite -- we have wrappers for mathematica functions in GAMBIT, so we can use Mathematica codes (i.e. SUSYHD) in GAMBIT. What GAMBIT capabilities would you like to use in Mathematica?
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if not, any plans for writing one?all
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what does feynrules do differently to the feynarts/looptools package - FeynRules derives the Feynman rules (= a model file) from the Lagrangian, FeynArts generates the diagrams, FormCalc computes them, and LoopTools evaluates the one-loop integrals contained in the amplitude
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how do you add charmonium to calchep
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Can you demonstrate something really basic with your program like the most basic calculationallFor SARAH: Slide 2
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can you demonstrate how to add a single particle to the SM in recfastDouglas Scott
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so what's the observables of CMB that codes can do? the anisotropy can be calculated by CAMB, the recombination is by RECFAST, do we have anything else done by code easilyDouglas Scott
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Why does SARAH recalculate vertices everytime I load a model? For example, I start a model and run MakeSPheno[]. SARAH will calculate the vertices in the process. If I exit the kernel and come back again and start the same model and run, say, MakeUFO[], it does not use the already exisiting vertices but calculates them again. Is that normal?Florian StaubSlide 10
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If I want to develop a cosmology code, in your opinion, what cosmology observable/ process is not coded yet, and easy to automate?All
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If pdgs are numerically fitted through a mixture of experimental and theoretical results how do we know that there isn't some new physics hiding in the pdgs?Mrenna
Do you mean, how do we know if the exclusive and inclusive widths given to us by the Particle Data Group are contiminated with new physics? Please clarify. Or, maybe you mean parton distribution functions?
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This is probably more of a Mac developper question, but just in case the answer is known: when I try to make Model=SMSSM as in the 3rd tutorial, I get an error "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar: illegal option -- U" which then stops the code running, and the SpenoSMSSM file is never created. Any ideas on how to fix this error?Florian StaubTry to remove the -U from this line: ar -ruc -U $@ $*.o
in the Makefile
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Why does SARAH recalculate vertices everytime I load a model? For example, I start a model and run MakeSPheno[]. SARAH will calculate the vertices in the process. If I exit the kernel and come back again and start the same model and run, say, MakeUFO[], it does not use the already exisiting vertices but calculates them again. Is that normal?
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When I would try to run GAMBIT diagonostic system I would come up with the following error: gambit_1.1-1.1.1 vali$ ./gambit scanners
-bash: ./gambit: No such file or directory
Anders/cornell
Then GAMBIT has not been compiled successfully. Please follow the installation instructions in the file Installation_before_tutorial.txt on the Indico page.
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problem related to GAMBIT.for authors.
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CMake Error at CMakeLists.txt:64 (message):
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You seem to have selected the Clang compiler. Beware that if you are using
Sorry that you spent 3 hours on this. You need to have gcc/g++ installed (which you probably do if you have gfortran installed) and you need to let cmake know to use that compiler. Please see the installation instructions posted on indico for more details both on how to install the compiler with homebrew (if you don't have it) and how to let cmake know to use that particular compiler. (This assumes you are using MacOS, is that right?)
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a mac, Clang may be your default compiler even though you might think it is
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gcc. You can thank Apple for that, not GAMBIT/cmake.
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GAMBIT does not support the Clang compiler. Please choose another
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compiler.
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spent 3 hours trying to solve this. Please help find a solution. from Oleg.
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Will it be possible to watch videos of the talks at some point? Organizers
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what BSM particles are ionizing.recfast
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