Gearing up for LHC13

Aug, 31 2015 - Oct, 16 2015

Participants are asked to stay for at least 2 weeks.


Each week will focus on different topics:

week 1-2: supersymmetry 

week 3-4: Higgs couplings, composite Higgs, extended Higgs sectors

week 5-6: exotics, dark matter


G. Giudice (CERN, Switzerland), C. Grojean (ICREA at IFAE Barcelona, Spain), M. Redi (INFN Florence, Italy), Marumi Kado (CERN, Switzerland) P. Sphicas (University of Athens Greece and CERN, Switzerland), Jesse Thaler (MIT Center for Theoretical Physics Cambridge, USA), K. Zurek (LBNL and Berkeley Center for Theoretical Physics (UCB))




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Gearing up for LHC13 (Conference) - Oct, 13 2015


2015 will be an important year for the Large Hadron Collider. With the start of Run 2 at a centre of mass energy of 13-14 TeV, it will be possible to probe the existence of heavier states as expected in extensions of the Standard Model motivated by e.g. naturalness and dark matter. Preliminary results from Run 2 could either confirm the Standard Model with high accuracy or provide first hints of new structures at the TeV scale. In either case, the results from Run 2 will determine much of the future of the field for decades. The workshop aims to bring together experimentalists and theorists to discuss early Run 2 results and their implications for particle physics.


-New and upcoming results from the LHC run II
-Implications for physics beyond the Standard Model
-New searches at LHC
-Future of particle physics

Sep, 01 2015 - 11:00 James Olsen Prospects for SUSY searches at 13 TeV: CMS perspective Seminar Slides
Sep, 02 2015 - 11:00 Thomas Gregoire Models of Split SUSY at Current and Future Colliders Seminar Slides
Sep, 03 2015 - 11:00 Alberto Mariotti Z-peaked excess in goldstini scenarios Seminar

I will first review the 3-sigma Z-peaked excess recently reported by the ATLAS collaboration and its possible interpretation in supersymmetric models. I will then discuss basic aspects of scenarios with multiple supersymmetry breaking sectors in gauge mediation. In particular I will explain how the low energy spectrum presents in this case extra light fermionic degrees of freedom, the pseudo-goldstini. I will derive their radiatively induced mass and describe their interactions with the MSSM particles. I will then show how a simplified model in the MSSM with pseudo-goldstini can accommodate the Z-peaked ATLAS excess without conflicting with other existing LHC searches.

Sep, 04 2015 - 11:00 Diego Redigolo General Gauge Mediation at the Weak Scale Seminar Slides
Sep, 07 2015 - 11:00 Dario Buttazzo Extra Higgs bosons in SUSY and beyond Seminar
In the motivated hypothesis that the Higgs bosons of the next-to-minimal
 supersymmetric Standard Model (NMSSM) be the lightest new particles 
around, I outline a possible overall strategy to search for signs of the
 extra CP-even scalars. In a generic NMSSM which minimises the 
fine-tuning of the electroweak scale, I show how the measurements of the
 couplings of the 125 GeV Higgs boson and the direct searches for the 
new states at colliders constrain the physical parameters in a 
complementary way. I will devote particular attention to the physically 
interesting limit where the Higgs mixes mainly with a singlet scalar, 
which can be treated in a simple and fully model-independent way. After 
analysing the current bounds, I will present an estimate of the reaches 
of future machines – from the forthcoming LHC runs up to a futuristic 
100 TeV collider.
Sep, 08 2015 - 11:00 Pascal Pralavorio SUSY lessons from Run1 and why we could still miss it in Run2 Seminar Slides
Sep, 08 2015 - 14:00 Ryuichiro Kitano Discussion on Strong CP problem Discussion
Sep, 09 2015 - 11:00 Hyung Do Kim N Naturalness : Cosmological solution to the hierarchy problem Seminar
Sep, 10 2015 - 11:00 Robert Ziegler Light Sparticles in NMSSM + Gauge Mediation Seminar
I will discuss a simple and predictive model that combines the NMSSM and
 Gauge Mediation. Originally proposed by Delgado, Giudice and Slavich, 
we have re-analyzed this model and found new interesting regions in the 
parameter space with a light singlet state that mixes with the SM-like 
Higgs at 125 GeV. This mixing is small enough to evade LEP and LHC 
constraints, but large enough to give a substantial contribution to the 
tree-level Higgs mass. This allows to reduce the required mass scale of 
supersymmetric particles, making them accessible at the early phase of 
LHC Run II. Essentially only a single parameter is left undetermined 
that controls the gravitino phenomenology and can lead to novel collider
Sep, 11 2015 - 11:00 Daniel Stolarski Searching for new Physics with the Higgs Seminar

In this talk I will discuss how both production and decay of

the Higgs can be used to discover new physics. On the production side,
I will focus on new colored states such as stops modifying single and
double Higgs production via gluon fusion.
On the decay side, I will focus on kinematic distribution in the Higgs
decay to four leptons to show how those can be used to make
measurements that are complimentary to rate measurements, and can be

used to discover, for example, CP violation.

Sep, 14 2015 - 11:00 Giuliano Panico Effective field theory for double Higgs production Seminar

I will present a detailed study of double Higgs production via gluon fusion in the effective field theory framework. I will show that, in addition to the extraction of the Higgs trilinear coupling, this process can also provide useful information on several other Higgs interactions, most noticeably the ones involving the top quark. As an explicit application, I will focus on the hh -> bb gamma gamma channel and I will provide an estimate of the achievable precision at the 14 TeV LHC and at a future 100 TeV hadronic collider.

Sep, 15 2015 - 11:00 Daniel Froidevaux What have we learned from the run-1 ATLAS+CMS coupling combination towards run-2 measurements? Seminar Slides
Sep, 16 2015 - 11:00 Asimina Arvanitaki The Sound of Dark Matter: Searching for Light Scalars with Resonant-Mass Detectors Seminar Slides
Sep, 17 2015 - 11:00 Adam Falkowski Model-independent constraints on physics beyond the SM Seminar

I will discuss the interpretation of collider data in a model-independent framework of effective field theory beyond the standard model (SM).  This involves extending the SM Lagrangian by a  set of higher-dimensional operators. One effect of these operators is to modify the couplings of  the SM Higgs and gauge bosons away from the SM prediction. In the talk I will discuss the current constraints on these operators and the future prospects to probe them.

Sep, 17 2015 - 14:30 Curtin, Strassler Neutral Naturalness Discussion
Sep, 18 2015 - 11:00 Andrea Thamm Composite heavy vector triplets in the ATLAS di-boson excess and at future colliders Seminar Slides
Sep, 21 2015 - 11:00 Jamison Galloway Induced Electroweak Symmetry Breaking Seminar

Induced EWSB is a framework wherein the VEV of our light Higgs stems from a linear coupling of the Higgs doublet to another, heavier, EWSB source. This can be simply and naturally arranged in a strongly coupled model, or alternatively as a particular limit of a perturbative two Higgs doublet model.  In this talk, I’ll discuss these various model constructions and their phenomenological prospects at the LHC.

Sep, 22 2015 - 11:00 Bruno Mansoulie Where do we stand with high mass diboson searches in the Higgs sector? Seminar

* High mass Higgs (neutral scalar) resonances searches:
- present results from Atlas and CMS
- which models are worth exploring?
- how to implement non-zero width? Interference?
- what are the typical sensitivities at LHC run-2?
* Maybe if there is time: h(125) offshell results and interpretation

Sep, 23 2015 - 11:00 Alex Azatov Resolving the gluon fusion loop for the Higgs production LHC Seminar Slides
Sep, 24 2015 - 11:00 Andrea Tesi (Composite) Twin Higgs Seminar Slides
Sep, 23 2015 - 14:30 Jesse Thaler More on the LHC di-boson excess Discussion Slides Bonus material
Sep, 25 2015 - 11:00 Stefania Gori Higgs and flavor at the LHC Seminar Slides
Sep, 28 2015 - 11:00 Felix Yu The Co-annihilation Codex Seminar Slides
Sep, 29 2015 - 11:00 William Murray Situation and Outlook for (hadronic) diboson resonances Seminar Slides
Sep, 30 2015 - 11:00 Samuel McDermott The Galactic Center Excess: Have We Started to See Dark Matter? Seminar Slides
Oct, 01 2015 - 11:00 Yanou Cui Probing Baryogenesis with Displaced Vertices at the LHC Seminar Slides
Oct, 01 2015 - 14:30 Markus Luty Higgs Beyond the Standard Model Discussion Bonus material
Oct, 02 2015 - 11:00 John March-Russell Twin Higgs Dark Matter Seminar Slides
Oct, 05 2015 - 11:00 Hyun Min Lee Communication to thermal dark matter with strong self-interactions Seminar Slides
Oct, 06 2015 - 11:00 Andrey Katz Low Scale Bryogenesis From Hidden Bubbles Collisions Seminar Slides
Oct, 07 2015 - 14:30 Kathryn Zurek Dark Matter beyond WIMPs Discussion
Oct, 07 2015 - 11:00 James Unwin Cosmology with democratic initial conditions Seminar Slides
Oct, 08 2015 - 11:00 Adrian Carmona Scalar heavy WIMPs from composite dynamics Seminar

I will present scenarios where the full Standard Model (including the Higgs) is extended with a new strongly-interacting composite sector featuring the spontaneous symmetry breaking of some global symmetry. I will show that under well-motivated conditions, the lightest pNGBs are natural dark matter candidates since they are protected by a symmetry not even broken in the electroweak phase. Finally, I will present a couple of minimal models which are compatible with current bounds from dark matter searches as well as electroweak and collider constraints on new resonances.

Oct, 09 2015 - 11:00 Tongyan Lin Dark sectors and missing energy searches at the LHC Seminar Slides