from Monday 18 June 2012
(08:00)
to Thursday 21 June 2012
(18:00)
at
Oskar Klein Auditorium support:
antje@fysik.su.se
Description:
Welcome to Tools 2012!
NEWS! With the support of the Oskar Klein Centre, Stockholm University, The Swedish Research Council, Enigmass and LAPTH we are happy to announce that we have decided to reduce the workshop fee to 0 SEK.
The program for the workshop is available by the link Timetable in the left-hand menu. You can also click here for a direct link.
The aim of the workshop is to review the main calculational tools, such as generators and Monte Carlos, for searches of the New Physics at present and future colliders as well as in non-collider physics experiments such as dark-matter searches. Issues and codes pertaining to the background will also be covered. Ultimately, the goal is a first comparison of all such tools with real data from the LHC and elsewhere.
The workshop is structured around (i) a series of talks (with and without software demo), (ii) tutorials, and (iii) round-table discussions. The talks give an overview of available tools, the tutorials convey hands-on information of the main packages, and in the round-table discussions we hope to discuss how the existing programs could be improved, how to incorporate different existing constraints, how to best present future data, and how modules from different codes could be sewn together and interchanged.
We plan to have the following themes:
Particle Physics Phenomenology
Scanning Tools
Event generators and detector simulators
Rare decays and other constraints
Astroparticle Physics Phenomenology
The program will consist of both invited talks, contributed talks, tutorials and round table discussions.
Some of the confirmed speakers are
John Ellis: Recent LHC results and implications on new physics models
Thomas Hahn: FeynHiggs and the impact of recent Higgs searches
Peter Skands: The Pythia event generator
Nazila Mahmoudi: SuperIso and the importance of rare decays
Alexander Pukhov: micrOMEGAs 2012
Alexander Belyaev: CalcHep and HEPMDB
Paolo Panci: Dark matter calculations with Mathematica tools
Joakim Edsjö: DarkSUSY and dark matter searches
Jad Marrouche: Mastercode and connections between accelerator and dark matter searches
Farhan Feroz: Recent developments in sophisticated scanning software, MultiNest/Bambi
Celine Combet: The CLUMPY code
Csaba Balazs: The Dark Matter Les Houches Accord, DLHA
Juergen Reuter: The WHIZARD event generator
Chung-lin Shan: AMIDAS (Package and website) for direct dark matter detection experiments
Florian Staub: SARAH: Spectrum-generator
Ben O'Leary: Fast approxiation of supersymmetry event rates beyond the CMSSM
Benjamin Fuks: FeynRules
Gullaume Serret: MadAnalysis 5
Tim Stefaniak: HiggsBounds
Stefan Liebler: SUSHI - SUperSymmetric Higgs production
Charlotte Strege: Constraints on dark matter and SUSY from global fits
Patrick Scott: Neutrino telescope likelihood extensions in DarkSUSY
Lisa Zeune: Framework for precision calculations in the NMSSM
Steve Muanza: Global Charge Asymmetry: A new method for indirect mass constraints at the LHC
Xavier Prudent: Constrained Supersymmetry after two years of LHC Data: Fittino
Local Organizing Comittee:
Lars Bergström (Stockholm University)
Christophe Clément (Stockholm University)
Joakim Edsjö (Stockholm University)
Sten Hellman (Stockholm University)
Klas Hultqvist (Stockholm University)
Natallia Karpenka (Stockholm University)
Abram Krislock (Stockholm University)
Maja Llena-Garde (Stockholm University)
Antje Putze (Stockholm University)
Christopher Savage (Stockholm University)
Jörgen Sjölin (Stockholm University)
International Advisory Board:
L. Bergstrom
E. Boos
F. Boudjema
J. Huston
F. Krauss
M. Peskin
G. Polesello
TOOLS 2012 is supported by
The Oskar Klein Centre
Stockholm University
The Swedish Research Council
Enigmass
Laboratoire d'Annecy-le-View de Physique Théorique
SARAH: Spectrum-Generator-Generator and more (30')
( Slides )
Florian Staub (BCTP, University of Bonn)
SARAH is a Mathematica package optimized for the fast and exhaustive analysis of
supersymmetric models. It has been designed to handle every N = 1 SUSY theory with an
arbitrary direct product of SU (n) and/or U (1)
factors as gauge group. The chiral superfields can transform under arbitrary,
irreducible representations with regard to this gauge group, and all possible
renormalizable superpotential terms are supported. New models can be implemented in
an easy and straight-forward manner and SARAH can create as output model files for
FeynArts/FormCalc, CalcHep/CompHep, WHIZARD and Madgraph.
In addition, SARAH can be used as spectrum-generator-generatore because it writes
modules for SPheno to create a full-fledged spectrum calculator for new models. The
features of these spectrum generators include a precise mass spectrum calculation
using two-loop RGEs and full one-loop corrections, two and three body decays of SUSY
and Higgs particles as well as the calculation of electroweak precision observables.
Furthermore, SARAH is the heart of the recently presented 'SUSY toolbox' which
provides an environment for the study of MSSM extensions using SPheno,
CalcHep/MicrOmegas, WHIZARD and Higgsbounds. This framework combines the different
outputs of SARAH to provide a closed tool-chain from model building to phenomenology.
In this talk, I would like to present FeynRules, a Mathematica® package that allows
the calculation of Feynman rules in momentum space for any quantum field theory
physics model, starting from the model Lagrangian. The Feynman rules calculated by
the code can then be used to implement the new physics model into other existing
tools, such as Monte Carlo generators, via a set of dedicated interfaces. A special
emphasis will be put on the new features and future development plans:
- The Universal FeynRules Output (UFO)
- The superspace module
- Supersymmetric RGE's and interface with the SuSpect-3 program
- Spin 3/2 physics
- Automatic model file generation
- Web-based model validaltion
19:00->21:00Welcome Reception
(Location:
Rotunda / Main entrance
)
The WHIZARD event generator, release 2.1: Status and News (40')
( Slides )
Juergen Reuter (DESY)
In this presentation we release the new version 2.1 of the Monte Carlo event
generator WHIZARD for high-energy physics collider experiment simulations. After
reviewing the status of the new development line 2.x, we discuss news and
improvements coming with the first major revision 2.1. These include the analytic
parton shower for initial and final state radiation, developments in the direction of
support for NLO calculations, more efficient generation and evaluation of
multi-parton SM matrix elements, new BSM features as well as important technical
improvements.
SuperIso and the importance of rare decays (40')
( Slides )
Nazila Mahmoudi (CERN & Clermont Université)
11:45
SPheno 3.1: extensions including flavour, CP-phases and models beyond the MSSM (40')
( Slides )
Florian Staub (BCTP, University of Bonn)
We describe recent extensions of the program SPheno including flavour aspects,
CP-phases, R-parity violation and low energy observables. In case of flavour mixing
all masses of supersymmetric particles are calculated including the complete flavour
structure and all possible CP-phases at the 1-loop level. We give details on
implemented seesaw models, low energy observables and the corresponding extension of
the SUSY Les Houches Accord. Moreover, we comment on the possiblities to include MSSM
extensions in SPheno.
12:30
Lunch break
14:30->15:50Higgs physics
(Convener:
Peter Skands (CERN)
)
14:30
FeynHiggs and the impact of recent Higgs searches (40')
( Slides )
Thomas Hahn (MPI f. Physik)
15:15
SUSHI - SUperSymmetric Higgs production (30')
( Slides )
Stefan Liebler (Bergische Universitaet Wuppertal)
We present a Fortran code which calculates the production cross section for the
(lightest) Higgs boson in the SM and MSSM resulting from gluon fusion and
bottom-quark annihilation.
Differential and total cross sections are obtained at NLO in gluon fusion, taking
into account the full contribution from the third generation of quarks and squarks in
the MSSM. Inclusive weighted results up to NNLO from gluon and/or bottom-quark fusion
can be added.
In addition to the features of this program, the talk discusses the impact of
different renormalization schemes for the squark sector in the MSSM.
15:50
Coffee break
16:20->17:05Higgs physics
(Convener:
Peter Skands (CERN)
)
16:20
HiggsBounds and the HiggsSignals extension: status and prospects (40')
( Slides )
Tim Stefaniak (Bonn University)
We present the current status of the public Fortran code HiggsBounds. The program
confronts arbitrary Higgs sectors with the exclusion limits from direct Higgs searches at
LEP, Tevatron and the LHC. We demonstrate a recent improvement of the model
likeness criteria, which allows in particular Higgs searches combining different channels
to be applied to a wider class of models. Furthermore, we shall discuss some ideas for a
planned code extension (HiggsSignals), which tests the agreement of a model with
possible future observations of a Higgs signal at the LHC.
17:05->18:30Event generators
(Convener:
Peter Skands (CERN)
)
CalcHEP and HEPMDB: a practical introduction (40')
( Slides )
Alexander Belyaev (University of Southampton)
The practical introduction into CalcHEP package and High Energy Physics Model
database will be given together with the short tutorial.
CalcHEP is a powerful tool for theoretical, phenomenological and experimental studies
in High Energy Physics (HEP). CalcHEP allows users to automate the calculations
and studies starting from the introduction of any user-defined model and ending by
the realistic event simulation, kinematical distributions and analysis. In its
present status CalcHEP can be considered is a ready setup for study of LHC physics
within Standard Model and Beyond.
On the other hand HEPMDB is a convenient centralized storage environment for HEP
models, and can accommodate, via web interface to the HPC cluster, the validation of
models, evaluation of LHC predictions and event generation-simulation chain. The
ultimate goal of HEPMDB is perform an effective LHC data interpretation isolating
the most successful theory for explaining the LHC observations.
Alexander Pukhov (Skobeltsyn Institute of Nuclear Physics)
10:30
Coffee break
11:00->12:30Dark matter and particle physics tools
(Convener:
Pat Scott (McGill University)
)
11:00
Mastercode and connections between accelerator and dark matter searches (40')
Jad Marrouche (CERN)
11:45
Dark matter calculations with Mathematica tools (40')
( Slides )
Paolo Panci (University of Southern Denmark, CP3-Origins)
12:30
Lunch break
14:30->15:40Dark matter and particle physics tools
(Convener:
Oscar Stål (DESY)
)
14:30
CLUMPY: A code for gamma-ray signals from dark matter structures (30')
Celine Combet (LPSC, Grenoble)
In this talk, I will give an overview of the main properties and functionalities of
the CLUMPY code. CLUMPY performs a semi-analytical calculation of the γ-ray flux
astrophysical J-factor from dark matter annihilation/decay in the Galaxy, including
dark matter substructures. The code can be used in three modes: i) to draw skymaps
from the Galactic smooth component and/or the substructure contributions, ii) to
calculate the flux from a specific halo (that is not the Galactic halo, e.g. dwarf
spheroidal galaxies) or iii) to perform simple statistical operations from a list of
allowed DM profiles for a given object.
15:05
AMIDAS (Package and Website) for Direct Dark Matter Detection Experiments (30')
( Slides )
Chung-Lin SHAN (Institute of Physics, Academia Sinica)
In this talk I will demonstrate how to use the AMIDAS package online for both
Monte-Carlo simulations and analyzing (pseudo)data sets to extract properties of halo
WIMPs, e.g., the mass and the (ratios between the) spin-independent and
spin-dependent couplings/cross sections on nucleons. In order to show the
model-independence of the AMIDAS package, a comparison between the blindly
reconstructed results and the original (non-standard) input setup for generating both
the WIMP signals as well as a small amount of artificially added background events
will also be given.
15:40
Coffee break
16:10->17:20Dark matter constraints and searches
(Convener:
Oscar Stal (DESY)
)
16:10
Constraints on Dark Matter and SUSY from global fits including LHC and direct detection data (30')
( Slides )
Charlotte Strege (Imperial College London)
The dark matter particle is currently being searched for with several observational
channels, including the LHC and direct detection experiments. These experiments
already place constraints on a number of theoretical WIMP models, including
weak-scale supersymmetry (SUSY). In this talk, I will present constraints on the
parameters of the constrained Minimal Supersymmetric Standard Model (cMSSM) obtained
from global fits including recent data from the LHC and the XENON100 direct detection
experiment.
16:45
Neutrino telescope likelihood extensions in DarkSUSY (30')
Patrick Scott (McGill University)
I will discuss the new neutrino telescope likelihood routines in DarkSUSY. These are
based on a fast method for including event-level IceCube data in likelihood
calculations, and are optimised for global-fit type parameter explorations of
theories for new physics. The likelihood construction is not at all specific to
SUSY, and includes both angular and spectral information about neutrino events, as
well as their total number. I'll also discuss a corresponding measure for simple
model exclusion, which can be used for single models without reference to the rest of
a parameter space. I'll illustrate the use of the new routines with a number of
examples from the MSSM, and show that including spectral information significantly
improves model reconstructions.
Fast Approximation of Supersymmetry Event Rates Beyond the CMSSM (40')
( Slides )
Ben O'Leary (Wuerzburg University)
Now that predictions of supersymmetric models can finally be compared to LHC data, it
is important to have a means of quickly evaluating signal rates for parameter points
during scans without having to generate and analyze full Monte Carlo simulations. We
have written C++ code (LHC-FASER) which quickly estimates the event rates that
would be seen at LHC, taking into account production cross-sections, branching ratios,
and the effect of kinematic cuts, and does not rely on any particular SUSY-breaking
scheme or mass hierarchy. This can be of particular use to fitting codes, especially since
the lack of observation of sparticles thus far implies that event rates may be the only
measurable observable available for the foreseeable future. The new version of LHC-
FASER has a much larger, updated signal set.
10:30
Coffee break
11:00->12:15Particle physics - phenomenology and searches for new physics
(Convener:
Abram Krislock (OKC)
)
11:00
MadAnalysis 5, a user-friendly framework for collider phenomenology (40')
( Slides )
Guillaume SERRET (IPHC Strasbourg)
We present MadAnalysis 5, a new framework for phenomenological inves-
tigations at particle colliders. Based on a C++ kernel, this program allows
to efficiently perform, in a straightforward and user-friendly fashion, sophis-
ticated physics analyses of event files such as those generated by a large class
of Monte Carlo event generators. MadAnalysis 5 comes with two modes
of running. The first one, easier to handle, uses the strengths of a powerful
Python interface in order to implement the analysis by the mean of a set
of intuitive commands. The second one requires to implement the analysis
in the C++ programming language, directly within the core of the anal-
ysis framework. This opens unlimited possibilities concerning the level of
complexity which can be reached by the analysis, being only limited by the
programming skills and the originality of the user.
11:45
Global Charge Asymmetry: a New Method for Indirect Mass Constraints at the LHC (30')
( Slides )
Steve Muanza (CPPM Marseille, CNRS-IN2P3)
Contrarily to most of the previous colliders, the initial state at the LHC is charge
asymmetric. This property has been measured on the W process by the ATLAS and the CMS
collaborations using their 2010 datasets.
We propose a new method to use the global charge asymmetry of a production process
to constrain the mass of its final state.
We'll illustrate this method using particle level MC samples run through a fast
simulation of an LHC detector on the W->l+nu process. In particular, we'll propagate
separately the theoretical and the experimental uncertainties in order to estimate
the mass resolution of our method.
The application of this new method can be interesting to obtain further constraints
in some BSM searches as we'll briefly illsutrate.
12:15
Lunch break
14:00->14:35Scanning Tools and Algorithms
(Convener:
Joakim Edsjö (OKC)
)
14:00
Constrained Supersymmetry after two years of LHC data: a global view with Fittino (30')
Xavier Prudent (Institut für Kern- und Teilchenphysik, TU-Dresden)
We perform global fits to the parameters of the Constrained
Minimal Supersymmetric Standard Model (CMSSM) and to a variant with
non-universal Higgs masses (NUHM1), taking into account the current
LHC exclusions from searches in jets plus missing transverse energy
signatures with about 5/fb integrated luminosity. We include
the recent LHCb upper bound on the branching ratio
Bs->mu+mu-. Also, constraints from and implications for
direct and indirect dark matter searches are discussed. The minimum
of the CMSSM fit prefers a light Higgs boson just above the
experimentally excluded mass. A potential SM-like Higgs boson with
mass around 126GeV can barely be accommodated. Values for Bs->mu+mu- just around
the Standard Model prediction are
naturally expected in the best fit region. The most-preferred region
is not yet affected by limits on direct WIMP searches, but the next
generation of experiments will probe this region. Finally, we
consider the fine-tuning implications of our best fit regions.
14:35->15:05Particle physics - phenomenology and searches for new physics
(Convener:
Joakim Edsjö (Fysikum)
)
14:35
Framework for precision calculations in the NMSSM (30')
( Slides )
Zeune Lisa (DESY)
We present a framework for precision calculations and numerical studies in the NMSSM.
As a first example, we study the decay of a NMSSM Higgs boson into two photons and
show that the interpretation of the excess recently observed in the Higgs searches at
the LHC in terms of a 125 GeV Higgs with an enhanced gamma gamma rate would be
compatible with the lightest CP-even Higgs in the NMSSM. As another application of
the new framework we present the theoretical prediction of the W boson mass in the
NMSSM and discuss the impact of LHC Higgs and SUSY searches on MW.