LHC - Cosmology Interplay

25 Jun 2007, 10:00 → 10 Aug 2007, 18:00 Europe/Zurich

CERN PH-TH

John Ellis, Sabine Kraml

This TH visitor programme focuses on the interplay between LHC phenomenology and cosmology, in order to work out what we may learn from discoveries at the LHC about the Early Universe.

Monday 25 June

discussion

First Results from the VERITAS Gamma-ray Telescopes

CERN EP Seminar, see here

Tuesday 26 June

discussion

1 Inert Higgs DM

Speaker: Narendra Sahu

Wednesday 27 June

Cosmo Coffee

2 Loop contributions to cosmological correlations and experimental constrains on chaotic inflation

Speaker: Martin Sloth

Slides Sloth_27-6-07.pdf

15:00 coffe & tea

Discussion on fits

3 Combination of cosmological fits and collider constraints (1)

Speaker: Julien Lesgourgues

Thursday 28 June

PhenClub

4 SUSY CPV, LHC, and dark matter

After a brief introduction to CP violation in the MSSM, we discuss how to probe the CP-violating mixing in the neutral Higgs-boson sector at the LHC. We observe that there is an interesting possibility to have the lightest relic neutralino as light as 2.9 GeV.

Speaker: Jae Sik Lee

Slides JSL.pdf

Friday 29 June

10:30 coffee & tea

Discussion on light DM

5 Axino and gravitino DM

Speaker: Ki Young Choi

Seminar

6 Recent Developments in Leptogenesis

Leptogenesis via right-handed neutrino decays is a successful mechanism to explain the matter-antimatter asymmetry of the Universe. I will discuss some recent developments, in particular flavour and memory effects.

Speaker: Isabella Masina (CERN)

Slides Masina.pdf

Monday 2 July

10:30 coffee & tea

plan of the week & informal discussions

16:00 coffe & tea / afternoon discussion

Tuesday 3 July

ATLAS visit (1 group)

15:00 coffee & tea

Discussion on Tools

7 Calchep and MicrOMEGAs

Speakers: Alexander Pukhov, Genevieve Belanger

Wednesday 4 July

Cosmo Coffee

8 Sweet Spot Supersymmetry

We find that there is no supersymmetric flavor/CP problem, mu-problem, cosmological moduli/gravitino problem or dimension four/five proton decay problem in a class of supersymmetric theories with O(1) GeV gravitino mass. The cosmic abundance of the non-thermally produced gravitinos naturally explains the dark matter component of the universe. A mild hierarchy between the mass scale of supersymmetric particles and electroweak scale is predicted, consistent with the null result of a search for the Higgs boson at the LEP-II experiments. We propose a parametrization of the model for the purpose of collider studies. The scalar tau lepton is the next to lightest supersymmetric particle in a theoretically favored region of the parameter space. The lifetime of the scalar tau is of O(1000) seconds with which it is regarded as a charged stable particle in collider experiments. We discuss characteristic signatures and a strategy for confirmation of this class of theories at the LHC experiments.

Speaker: Ryuichiro Kitano

Slides kitano_cern_070407.pdf

Seminar

9 What will we learn from the Planck satellite?

The Planck satellite, to be launched in 2008, is designed for measuring CMB temperature and polarization anisotropies with much better precision than the -already impressive- WMAP experiment. In this seminar, I will present the expected sensitivity of Planck to the parameters describing dark matter, dark energy, inflation, relic neutrinos, etc., which are also of great interest for particle physics. I will show how this sensitivity will increase, first, by performing a weak lensing analysis of the raw temperature map, and second, by combining Planck data with future large scale structure surveys.

Speaker: Julien Lesgourgues

Slides lesgourgues.pdf lesgourgues.ppt

15:00 coffee & tea

Thursday 5 July

PhenClub

Celebration of the 200th meeting! Drinks will be offered.

10 The Phenclub idea

Speaker: Robert Harlander

Slides http://indico.cern.ch/getFile.py/access?resId=1&materialId=slides&confId=18329

11 Anniversary speach

Speaker: Michelagelo Mangano

Slides http://indico.cern.ch/getFile.py/access?resId=0&materialId=slides&confId=18329

Friday 6 July

Visit to CMS (1 group)

Seminar

12 A Minimal Renormalizable Grand Unified Theory

We propose a renormalizable (SUSY) grand unified theory where the neutrino masses are generated through type III and type I seesaw mechanisms. Several phenomenological and cosmological aspects of this proposal are discussed.

Speaker: Pavel Fileviez Perez

Monday 9 July

10:30 coffee & tea / plan of the week / informal discussions

15:30 coffe & tea / afternoon discussions

Tuesday 10 July

ATLAS visit (1 group)

15:00 coffee & tea

Visit to CMS (1 group)

Wednesday 11 July

10:30 coffee & tea

Cosmo Coffee

13 Minimal dark matter

Speaker: Marco Cirelli

Paper paper1.pdf paper2.pdf

Slides MDM.pdf

Seminar

14 Flavour in the Era of the LHC

We discuss the opportunities in our search for `new physics' beyond the standard model offered by present and future flavour experiments. We show the interplay and complementarity of collider and flavour physics by some examples. Within this talk we focus on rare B and kaon decays. Moreover, we briefly discuss the restrictive role of long-distance strong interactions in flavour physics and some tools like QCD factorisation and soft-collinear effective theories (SCET) to handle them.

Speaker: Tobias Hurth

15:00 coffee & tea

Discussion of DM from models with extra singlets

Thursday 12 July

10:30 coffee & tea

PhenClub

15 A new technique for SUSY mass determination

A key ingredient in assessing whether or not a stable neutralino can explain the observed dark matter of the universe is the mass of the neutralino. For many SUSY decay chains, only mass differences can be well determined by conventional techniques leaving a large uncertainty in the absolute mass scale and therefore in the mass of the LSP neutralino itself. I describe a technique that can determine the neutralino mass to within a GeV or two in one of the standard SUSY decay chain scenarios for which only mass differences are well determined using other techniques.

Speaker: Jack Gunion

Seminar

16 Dark Matter in the Left-Right Twin Higgs Models

The dark matter candidate in the left-right Twin Higgs models falls in to the category of inert Higgs doublet models. We analysed the dark matter relic density and its direct and indirect detection potential.

Speaker: Shufang Su

Slides shufang_su.pdf

15:00 coffee & tea

Friday 13 July

10:00 coffee & tea / informal discussions

Seminar

17 Electroweak Baryogenesis, Dark Matter and Supersymmetry

I will review the present status of the analyses of the possibility of implementing the mechanism of generation of the baryon-antibaryon asymmetry at the electroweak scale, in supersymmetric extensions of the Standard Model. I will discuss the interrelation of this mechanism with the origin of dark matter, as well possible tests of these scenarios at the Tevatron and the LHC, as well as in dark matter detection and electric dipole moments experiments.

Speaker: Carlos Wagner

Slides Wagner130707.pdf.pdf

Monday 16 July

10:30 coffee & tea / plan of the week / informal discussions

15:30 coffee & tea / informal discussions

Tuesday 17 July

Visits to ATLAS (3 groups)

1st group 9:00
2nd group 10:30
3rd group 14:00

15:00 coffee & tea

Discussion on fits

18 Combination of cosmological fits and collider constraints (2)

Speaker: Dr Benjamin Allanach (University of Cambridge)

Wednesday 18 July

10:30 coffee & tea

Cosmo Coffee

19 Probing models of neutrino mass and neutrino interactions with the CMB

Speaker: Kathryn Zurek

Slides ZurekCERN.pdf

Seminar

20 Gravitino dark matter at LHC and GLAST

We consider supersymmetric theories where the gravitino is the lightest superparticle (LSP) and a charged scalar lepton the next-to-lightest superparticle (NLSP). Such a scenario can lead to spectacular signatures at the LHC, which we illustrate with several examples. A gravitino LSP can be the dominant component of dark matter. In the case of small R-parity breaking, it may first be disovered by GLAST.

Speaker: Wilfried Buchmueller

Slides buchmueller.pdf

15:00 coffee & tea

Miniworkshop

21 Opening

Speaker: Sabine Kraml

Slides miniws-opening.pdf

22 LHC-cosmology interplay

Speaker: John Ellis

23 GUT-less supersymmetry phenomenology

Speaker: Pearl Sandick

Slides GUTless071807.pdf GUTless071807.ppt

24 Gravitino DM with sneutrino NLSP

Speaker: Laura Covi

Slides covi-cosmoLHC.pdf.pdf

25 Gravitino DM with a stop NLSP

Speaker: Yudi Santoso

Slides santoso_GDMstopNLSP.pdf.pdf

Thursday 19 July

Miniworkshop

26 Multi-dimensional CMSSM fits

Speaker: Ben Allanach

Slides enTAPP.pdf

27 Dark matter in the constrained NMSSM

Speaker: Genevieve Belanger

Slides belanger_cnmssm.pdf belanger_cnmssm.ppt

28 Calculating the relic density at one-loop in SUSY

Speaker: Nans Baro

Slides baro_cern.pdf

10:30 break

29 Dark matter from technicolour

Speaker: Francesco Sannino

Slides Sannino-LHC-Cos-07.pdf

30 The observed properties of dark matter on small astrophysical scales, and the number of small satellites

New dynamical studies and discovery searches for the smallest dark matter dominated galaxies will be presented. Dark matter in dSph galaxies has a mean volume mass density within the stellar distribution which always has a very low value of about 5GeV/c^2 cm^-3. The mass profiles appear cored, not cusped as predicted by Cold DM models. Galaxies are embedded in dark matter halos with these properties; small systems containing dark matter are not observed.

Speaker: Gerry Gilmore

Paper ApJ.663.p948.2007.pdf

Slides

• GG_CERN_0707.pdf
• GG_CERN_0707.pdf
• GG_CERN_0707.ppt

Seminar

31 B physics, direct dark matter detection and SUSY Higgs searches at colliders

I will discuss the connection among Higgs Physics, Flavour Physics and Cosmology in Supersymmetric Models. I will highlight the impact of radiative corrections to the Higgs-fermion couplings which can lead to relevant Flavour concerving and FCNC effects. This will allow me to show the interplay between direct Higgs searches at the Tevatron and the LHC and the impact of present and projected experimental results for rare B decays, which can importantly contrain large regions of Supersymmetric parameter space. Finally, I will consider as well the interplay between Higgs searches at colliders and direct dark matter searches and its role in exploring Supersymetric scenarios.

Speaker: Marcela Carena

Slides http://home.fnal.gov/~carena/alcance/cernjuly07.pdf

15:00 coffee & tea

Miniworkshop

32 SUSY interpretation of the EGRET excess of diffuse Galactic gamma rays and implementation for the LHC

Speaker: Dmitri Kazakov

Slides CERN'0707.pdf

33 Test of EGRET hypothesis and indirect measurement of relic density at the LHC

Speaker: Christian Sander

Slides sander.pdf

34 New ideas in indirect detection

Speaker: Gianfranco Bertone

Slides Bertone_CERN_07.pdf

35 Non-thermal dark matter production and its cosmological implication

Speaker: Fuminobu Takahashi

Slides Takahashi.pdf

36 Dark matter and stars

Speaker: Malcolm Fairbairn

Slides fairbairn.pdf fairbairn.ppt

Friday 20 July

Miniworkshop

37 Electroweak baryogenesis

Speaker: Stefan Huber

38 Predictive model for dark matter, dark energy, neutrino masses and leptogenesis at the TeV scale

Speaker: Narendra Sahu

Slides narendra_cern.pdf

39 A graceful exit for old inflation and a possible solution to the hierarchy problem

Speaker: Alessio Notari

Slides notari.pdf

10:55 break

Seminar

40 Dark Matter as a Guide to SUSY at the LHC

If the lightest neutralino is a stable thermal relic from the Big Bang, thus comprising dark matter (DM) in the Universe, its relic abundance can be used to severely constrain the parameter space of supersymmetric models. For instance, in the paradigm mSUGRA model, each DM allowed region gives rise to distinct signatures for new physics at the LHC. We explore an array of well-motivated scenarios with non-universal soft terms --normal scalar mass hierarchy, non-universal Higgs models, mixed wino DM, bino-wino co-annihilation (BWCA) DM, low M_3 (compressed) SUSY, mixed higgsino DM, mixed moduli-AMSB DM-- and show that each of these gives rise to distinct characteristics that ought to be measureable by the Atlas and CMS experiments starting next year at the LHC.

Speaker: Howie Baer

Slides baer.pdf

Monday 23 July

10:30 coffee, informal discussions

Tuesday 24 July

10:30 coffee, informal discussions

Wednesday 25 July

10:30 coffee, informal discussions

Cosmo Coffee

Thursday 26 July

10:30 coffee, informal discussions

PhenClub

41 Radiative gravitino decays from R-parity violation

Part 1: Discussion of recent papers Part 2: Talk by S. Lola

Speaker: Smaragda Lola

Paper http://arxiv.org/abs/0707.2510

Friday 27 July

10:30 coffee, informal discussions

Tuesday 31 July

Seminar

42 Cosmology and Particle Physics with Warped Throats

Warped compactifications provide a mechanism for generating a hierarchy of physical scales. Strongly warped regions (throats) are also ubiquitous in compactifications with stabilized moduli. In this talk, we describe some recent attempts to construct string inflationary models using warped throats, the CMB signatures of these models, and how differences in the shape of the extra dimensions can show up in the CMB data. We then turn to discuss the possibility of using the LHC to distinguish different warped extra dimensions.

Speaker: Gary Shiu

Slides http://uw.physics.wisc.edu/~strings/shiu/CERN2007_v2.pdf Shiu_CERN2007.pdf

Wednesday 1 August

Cosmo Coffee

Seminar

43 Challenges and opportunities for the LHC era

Speaker: Michelangelo Mangano

Thursday 2 August

PhenClub

Monday 6 August

10:30 coffee, informal discussions

Tuesday 7 August

10:30 coffee, informal discussions

Wednesday 8 August

Cosmo Coffee

Seminar

44 The entropic approach to understanding the cosmological constant

It has recently been proposed to replace the anthropic principle with a more objective criterion: the likelihood of creating observers is proportional to the amount of entropy production within a causally connected region of the universe. This "entropic principle" does a better job of predicting the value of the cosmological constant than does its anthropic predecessor, and it is falsifiable, through its power to predict other properties of the universe to which the existence of observers is sensitive. For example, dark matter should be unstable on cosmological time scales.

Speaker: Jim Cline

Slides Cline.pdf

Thursday 9 August

PhenClub

45 SUSY SO(10) and its implications for colliders and cosmology

Part 1: Discussion of recent papers/events ***everybody is invited to contribute*** Part 2: Talk by Tomas Blazek

Speaker: Tomas Blazek

Slides SO10.pdf SO10.ppt

Seminar

46 Growing neutrinos and cosmological selection

The time evolution of a cosmological scalar field can be stopped by an increasing mass of the neutrinos. This leads to a transition from a cosmological scaling solution with dynamical dark energy at early time to a cosmological constant dominated universe at late time. The trigger for the transition is set at the time when the neutrinos become non-relativistic. This is a possible solution of the "why now" problem. We present a particle physics realization of this "growing matter" scenario. It is based on the very slowly varying mass of a superheavy scalar triplet field whose expectation value dominates the light neutrino masses. A simple and realistic dark energy cosmology can be obtained in this way.

Speaker: Christof Wetterich

Slides GrowingneutrinosCERN0807.pdf GrowingneutrinosCERN0807.ppt