XXIV Workshop on Weak Interactions and Neutrinos - WIN'13

Session

Working Group 4

17 Sept 2013, 09:00

Natal, Brazil

Conveners

Working Group 4: Astroparticle Physics - UHECR - Chair: Rogerio Rosenfeld

• Heidi Sandaker (University of Bergen (NO))
• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Marco Cirelli (IPhT CNRS/CEA Saclay)

Working Group 4: Astroparticle Physics - LHC - Chair: Heidi Sandaker

• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Heidi Sandaker (University of Bergen (NO))
• Marco Cirelli (IPhT CNRS/CEA Saclay)

Working Group 4: Astroparticle Physics - Cosmology and Neutrinos - Chair: Rogerio Rosenfeld

• Heidi Sandaker (University of Bergen (NO))
• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Marco Cirelli (IPhT CNRS/CEA Saclay)

Working Group 4: Astroparticle Physics - DM direct detection - Chair: Marco Cirelli

• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Heidi Sandaker (University of Bergen (NO))
• Marco Cirelli (IPhT CNRS/CEA Saclay)

Working Group 4: Astroparticle Physics - DM indirect detection and neutrinos - Chair: Heidi Sandaker

• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Marco Cirelli (IPhT Saclay, CNRS and CEA, Gif-sur-Yvette (FR))
• Heidi Sandaker (University of Bergen (NO))

Working Group 4: Astroparticle Physics - DM indirect detection with charged particles - Chair: Marco Cirelli

• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Marco Cirelli (IPhT Saclay, CNRS and CEA, Gif-sur-Yvette (FR))
• Heidi Sandaker (University of Bergen (NO))

Working Group 4: Astroparticle Physics - Theory - Chair: Marco Cirelli

• Rogerio Rosenfeld (UNESP - Universidade Estadual Paulista (BR))
• Marco Cirelli (IPhT Saclay, CNRS and CEA, Gif-sur-Yvette (FR))
• Heidi Sandaker (University of Bergen (NO))

44. Identification of Cosmic Rays: searches of ultra high energy neutrinos, photons and nuclear elements at the Pierre Auger Observatory

Dr Hernan Pablo Wahlberg (Universidad Nacional de La Plata (AR))

17/09/2013, 09:00

Working Group 4

talk

The Pierre Auger Observatory is a unique instrument that combines a surface array of water cherenkov detectors and fluorescence telescopes. Both techniques allow to search and discriminate between photons, neutrinos and nuclear elements. Recent measurements and searches on the different species will be presented.

25. Particle Physics with the Pierre Auger Observatory: p-air cross section at $\sqrt{s}=$ 57 TeV per nucleon

Edivaldo Moura Santos (Universidade Federal do Rio de Janeiro)

17/09/2013, 09:20

Working Group 4

talk

The Pierre Auger Observatory has measured the proton-air cross section for particle production at the CM energy per nucleon of 57 TeV using the extensive air showers produced when ultra-high energy (E > 1018:5 eV) protons smash Nitrogen and Oxygen nuclei at the top of Earth's atmosphere. We describe here the details of this measurement, with special attention to the systematics affecting it. A...

43. Where do UHECR results lead us ?

Esteban Roulet (C)

17/09/2013, 09:40

Working Group 4

talk

I will review the main results on UHECRs, including the observed suppression at the highest energies, the different spectral breaks observed, the inferred trends on the composition, bounds on photons and neutrinos and the different hints on anisotropies to discuss the possible astrophysical scenarios they could be suggesting and the strategies to further test them.

141. Discussion Session: AUGER results

Esteban Roulet (C)

17/09/2013, 10:10

137. Dark matter searches and results linked to astroparticles physics from ATLAS and CMS

Michele Weber (Universitaet Bern (CH))

17/09/2013, 11:00

Working Group 4

talk

n this talk we will present an overview of the searches for Dark Matter performed by the ATLAS and CMS collaborations. Several models for new physics beyond the Standard Model which are probed at the LHC also include a Dark Matter candidate. Additionally, searches for direct production of WIMP candidates will be shown, which look for events containing only a single object and large missing...

120. Dark Matter search at LHC

Xuai Zhuang (Chinese Academy of Sciences (CN))

17/09/2013, 11:30

Working Group 4

talk

The existence of significant amount of dark matter in the Universe is one of the strongest motivations to have new physics beyond the Standard Model. Dark Matter search at LHC with a focus on conventional candidates and techniques (e.g. SUSY) in ATLAS and CMS experiments using data from 2011 and 2012 will be reviewed in the talk.

87. Dark matter searches with a focus on new techniques (Mono-X)

James Douglas Pearce (University of Victoria (CA))

17/09/2013, 12:00

Working Group 4

talk

The quest to understand the nature of Dark Matter has never been so exciting. Vast improvements in direct detection sensitivity combined with tantalizing hints from astrophysical data have lead some to dub the 2010's as the "Dark Matter Decade". Today collider based experiments, such as ATLAS and CMS, offer a new vantage point in the search for non-gravitational dark matter interactions. If...

119. Results from the ANTARES Neutrino Telescope

Mr Alexis Dumas (ANTARES / LPC Clermont-Ferrand)

17/09/2013, 15:00

Working Group 4

talk

ANTARES Neutrino Telescope is a 0.1 km3 instrumented volume installed in the french coast of Mediterranean Sea. It consists in 885 photo-multiplier tubes arranged in a 3D-array of 12 lines and oriented for up-going neutrino detection, having a complementary coverage to that of IceCube, with a full coverage of our galaxy centre. Physics analysis performed in ANTARES collaboration will be...

50. Determining the neutrino mass hierarchy with PINGU

Alexander Kappes (Humboldt University / DESY)

17/09/2013, 15:30

Working Group 4

talk

The determination of the neutrino mass hierarchy is among the most fundamental questions in particle physics. The recent measurement of a large mixing angle theta_13 and the first observation of atmospheric neutrino oscillations at tens of GeV with neutrino telescopes opens the intriguing new possibility to exploit matter effects in neutrino oscillation to determine the mass hierarchy in the...

29. Neutrinos, BBN and Nuclear Astrophysics

Dr Carlo Gustavino (INFN)

17/09/2013, 16:00

Working Group 4

talk

Big Bang Nucleosynthesis (BBN) theory describes the formation of light isotopes such as D, 3He, 4He, 6Li and 7Li in the first minutes of cosmic time. Their abundance only depends on the baryonic density, on particle physics and on nuclear astrophysics, through the competition between the universal expansion rate and the yields of relevant nuclear reactions. As the expansion rate depends on the...

142. Discussion Session: PLANCK results

Silvia Galli

17/09/2013, 16:30

85. Recent Results and Prospects from CDMS

Ben Loer (Fermilab)

19/09/2013, 09:00

Working Group 4

talk

The Cryogenic Dark Matter Search experiment employs ultra-cold germanium and silicon crystals to search for interactions with Weakly Interacting Massive Particles, and has recently published an analysis of data from silicon detectors that found three events that could be interpreted as arising from a low-mass WIMP. I will present an overview of semiconductor WIMP searches, with emphasis on the...

108. The XENON project: status and prospects

Marco Selvi (INFN)

19/09/2013, 09:30

Working Group 4

talk

Astronomical and cosmological observations indicate that a large amount of the energy content of the Universe is made of dark matter. Particle candidates under the generic name of Weakly Interacting Massive Particles (WIMPs) arise naturally in many theories beyond the Standard Model of particle physics, such as supersymmetry, universal extra dimensions, or little Higgs models. The search for...

110. The LUX Dark Matter experiment

Markus Horn (Yale University)

19/09/2013, 10:00

Working Group 4

talk

The LUX (Large Underground Xenon) experiment aims at the direct detection of dark matter particles via their collisions with xenon nuclei. The 350 kg two-phase liquid xenon time projection chamber measures simultaneously the scintillation and ionization from interactions in the target. The ratio of these two signals provides very good discrimination between potential nuclear recoil signals and...

56. Searches for Dark Matter with radio and gamma lines

Dr Marco Taoso (IPhT Saclay Paris)

19/09/2013, 11:00

Working Group 4

talk

Annihilations of Dark Matter in the form of WIMPs produce photon fluxes ranging from radio wavelengths to gamma-rays. In particular, low energy emissions are associated with the interactions of the WIMPs annihilation products with the intergalactic medium. I will present constraints on the WIMPs properties from current radio surveys and I will discuss the prospects for detection with future...

159. Are IceCube neutrinos unveiling PeV-scale decaying dark matter?

Arman Esmaili Taklimi

19/09/2013, 11:30

Working Group 4

talk

Recent observations by IceCube, notably two PeV cascades accompanied by events at energies ~ (30-400) TeV, are clearly in excess over atmospheric background fluxes and beg for an astroparticle physics explanation. In this talk I will discuss the possibility to interpret the IceCube data by PeV mass scale decaying Dark Matter. I discuss generic signatures of this scenario, including its unique...

105. The ANDES project and its impact on neutrino physics

osvaldo civitarese (U)

19/09/2013, 12:00

Working Group 4

talk

The ANDES project aims at the construction of an underground laboratory in the Agua Negra tunnel between Argentina and Chile. The laboratory will consists of a series of halls, each of them able to accommodate state of the art experimental arrays dedicated to dark matter, double beta decay and neutrino oscillation measurements, as well as to other devices oriented to geological and...

96. Status of GeV-TeV charged CR propagation models and observational results

PIERRE SALATI (LAPTh & Université de Savoie)

19/09/2013, 17:30

Working Group 4

talk

The discovery in 2008 of a cosmic ray (CR) lepton anomaly has raised the tremendous hope that WIMPs were not just a fantasy. The astronomical dark matter is believed to be made of these weakly interacting and massive species whose annihilations would produce an excess of positrons in the cosmic radiation. Alas, the dust has now settled down. Local pulsars are suggested as the probable...

52. Antiproton constraints on Dark Matter

Mrs Gaëlle Giesen (IPhT- CEA Saclay)

19/09/2013, 18:00

Working Group 4

talk

The current antiproton data from PAMELA imposes constraints on annihilating and decaying DM which are similar to (or even slightly stronger than) the most stringent bounds coming from Fermi gamma rays, for hadronic channels and with fiducial choices for the astrophysical parameters. The implications of the most recent data by AMS-02 will be discussed. In fact, these constraints can be improved...

98. Search for fundamental physics with HESS and CTA

Dr Christian Farnier (Oskar Klein Centre, Stockholm University)

19/09/2013, 18:30

Working Group 4

talk

The H.E.S.S. experiment of imaging atmospheric Cherenkov telescopes (IACT) operational since 2004, has discovered many new sources of cosmic-ray acceleration and searched for fundamental physics. In September 2012, a fifth and larger telescope was inaugurated, lowering the energy threshold and starting the second phase of the experiment. In the coming years, the Cherenkov Telescope Array (CTA)...

116. Dark Matter: room for new ideas?

Laura Lopez Honorez (V)

20/09/2013, 09:00

Working Group 4

talk

Dark matter candidates are getting surrounded by direct, indirect detection searches and collider experiments. As of today, none of these experiments have obtained an indisputable proof of the existence of the dark matter particle and they are dreadfully digging into their viable parameter space. One could thus ask if there is still room for new ideas in the dark matter sector. There has...

76. Pseudo Nambu-Goldstone bosons as dark matter candidates

Michele Frigerio (Laboratoire Charles Coulomb)

20/09/2013, 09:30

Working Group 4

talk

I will argue that, besides the axion, there are other pseudo Nambu-Goldstone bosons that are suitable candidates for the dark matter. Their mass and interactions can be connected to the electroweak scale, and in this case the dark matter properties are interlaced with the properties of the Higgs boson. In particular, I will discuss the possibility that both the Higgs and the dark matter are...

74. Leptogenesis: status, recent ideas and perspectives

Dr Jean Racker (IFIC)

20/09/2013, 10:00

Working Group 4

talk

Leptogenesis from the decay of very heavy neutrinos (M > 10^8 GeV) is arguably the most attractive explanation to the origin of the cosmological baryon asymmetry. However this scenario cannot be proved in foreseeable experiments. Therefore we will give an overview of leptogenesis with emphasis on testability vs. plausibility of different models. In connection with this, we will present some...