PAHEN 2019, Berlin

25 Sept 2019, 08:00 → 27 Sept 2019, 18:00 Europe/Berlin

1.101 (HU Berlin)

Slides 190925_Pahen.pptx

Wednesday, 25 September

Registration: Is open during the conference.

12:30 Lunch

Opening

slides Introduction.pdf

Presentation of recent results: Chair: Markus Ackermann

1 Recent results from IceCube

Speaker: C. Wiebusch

Slides 1_Wiebusch.pdf

2 Measurement of the diffuse astrophysical muon neutrino spectrum with ten years of IceCube data

The IceCube Neutrino Observatory has established the measurement of a flux of high-energy astrophysical neutrinos in several detection channels. Here, we present an update to the analysis of through-going muon-neutrinos from the Northern Hemisphere. It was extended to almost ten years of data which have been re-processed (Pass-2) applying consistent event-selections and reconstructions. Additionally, an improved treatment of systematic uncertainties on the atmospheric fluxes was implemented. We present results of the updated spectral fit and discuss how the measurement compares to other results.

Speaker: Joeran Stettner (RWTH Aachen University)

Slides IceCube_DiffuseNuMu_PAHEN2019Berlin.pdf

3 Recent results from ANTARES

Speaker: Veronique van Elewyck

Slides ANTARES_PAHEN2019_VanElewyck_vfinal_nobackup.pdf ANTARES_PAHEN2019_VanElewyck_vfinal_nobackup.pptx

4 Results from the ANITA Experiment

I will summarize results to date from ANITA, a NASA Long Duration Balloon payload that has had four successful flights in Antarctica. ANITA is sensitive to two kinds of radio emission from particle showers: Askaryan emission from ultra-high energy (UHE) neutrinos interacting in the Antarctic ice, and Geomagnetic emission from UHE particles showering in the atmosphere. The latter channel is sensitive to cosmic ray air showers and air showers from any other UHE particles, such as tau leptons created in charged current tau neutrino interactions in the Earth or ice. I will discuss the results from searches in these channels with ANITA and possible interpretations of events observed with ANITA. I will also discuss a proposed follow-up NASA balloon mission, the Payload for Ultrahigh Energy Observations (PUEO), which will improve on ANITA’s sensitivity dramatically, improving sensitivity to UHE neutrinos in this energy regime, and providing follow-up on the events observed thus far with ANITA.

Speaker: Abigail Vieregg (University of Chicago)

Slides pahen_sept2019.pdf

15:30 Coffee Break

Overview of neutrino sources 1: Chair: Walter Winter

5 Neutrinos from blazars

IceCube has recently reported the discovery of high-energy neutrinos of astrophysical origin, opening up the PeV sky. These observations are challenging to interpret on the astronomical side and have triggered a fruitful collaboration across particle and astro-physics. I will present our work on blazars as possible neutrino sources, discuss briefly the association of some very high-energy IceCube neutrinos with the blazar TXS 0506+056, and show that TXS 0506+056 is not what it looks like.

Speaker: Dr Paolo Padovani (European Southern Observatory)

Slides Padovani_Berlin_Sept_2019.pdf

6 Neutrinos from Starburst

Speaker: Andrew Taylor

Slides Pahen_Starburst_Galaxies.pdf

7 Common origin of diffuse neutrinos and UHECRs?

Speaker: Dr denise boncioli (DESY)

Slides Boncioli_PAHEN2019.pdf

8 Neutrinos from Galaxy

Speaker: Dr Daniele Gaggero (GRAPPA, University of Amsterdam)

Slides PAHEN_gaggero.pdf

9 Neutrinos from disk outflow

Speaker: Susumu Inoue

Slides 5_Inoue.pdf

Postersession

Thursday, 26 September

The TXS 0506+056: Chair: Anna Franckowiak

10 High-Energy neutrinos from AGN?

Active Galactic Nuclei (AGN) have long been suggested among the candidate sources of cosmic high-energy neutrinos. If hadronic processes operate in the AGN jets, a lot can be learnt by combining neutrino observations with the putative accompanying electromagnetic information. This is motivated by the fact that both radiations may be pictured in the same astrophysical particle-cascades scenario, cascades that are ultimately originated by cosmic rays. While to date, no neutrino point sources have been identified at high confidence, a promising ground for discovery could be the search for transient and variable neutrino/electromagnetic sources, in which case the atmospheric neutrino and muon backgrounds can be reduced by taking advantage of time- and space-coincidence. Recent outcomes in this field will be presented.

Speaker: Dr Sara Buson (NASA-GSFC)

Slides 1_Buson.pptx

11 Theoretical interpretation: Historical flare

Speaker: Mr Xavier Rodrigues (DESY)

Slides pahen_talk_rodrigues.pdf

12 Theoretical interpretation: Models for 2017 flare

Speaker: Matteo Cerruti

Slides Cerruti_PAHEN.pdf

13 Observations: neutrinos, also with emphasis of 2014-15 flare

Speaker: Chad Finley

Slides 4_Finley.pdf

10:30 Coffee Break

Overview of neutrino sources, 2: Chair: Andrea Palladino

14 Generic constraints on sources of diffuse flux

Speaker: Shin'ichiro Ando (University of Amsterdam)

Slides PAHEN2019.pdf

15 Diffuse Neutrino Flux from Jetted AGN

Active galactic nuclei (AGN) with relativistic jets powered by accretion onto their central supermassive black hole are the most powerful persistent sources of electromagnetic radiation in the Universe, with bolometric luminosities of $\sim 10^{43}-10^{48}$ erg s$^{-1}$. Jetted AGN are promising cosmic ray accelerators and have abundant radiation fields for the production of high-energy neutrinos. As a result, they have been suggested as possible neutrino sources long before the discovery of an astrophysical neutrino flux by IceCube. In light of observational constraints and the recent neutrino detections associated with the blazar TXS 0506+056, I am going provide an overview of theoretical predictions for the diffuse neutrino flux from jetted AGN.

Speaker: Dr Maria Petropoulou Petropoulou (Princeton University)

Slides pahen_2019_petropoulou.pdf

16 Neutrinos from optical transients with IceCube

Since the detection of high-energy cosmic neutrinos at the IceCube Neutrino Observatory in 2013, there has been an on-going search to find suitable transient or variable source candidates. Despite recent evidence identifying a flaring blazar as a likely neutrino source, the vast majority of the diffuse neutrino flux measured by IceCube remains unexplained. The latest IceCube results testing time-dependent correlation between neutrinos and optical transients will be presented.

Speaker: Mr Robert Stein (DESY Zeuthen)

Slides stein_conference_pahen_19.pdf

17 DM interpretations of the diffuse flux

Speaker: Stefano Morisi

Slides 4_Morisi.pdf

12:30 Lunch

Multi-messenger physics: Chair: Elil Waxman

18 Prospects for the multi-messenger follow-up of high-energy neutrinos

Speaker: Avishay Gal-Yam

Slides 1_Gal-Yam.pptx

19 Neutrinos from NS-NS mergers

The mergers of neutron stars are expected to produce high-energy neutrinos through particle acceleration inside the relativistic jets. In this talk, I will discuss future prospects for high-energy neutrino detection coincident with gravitational waves. We consider two neutrino production scenarios. One is the late-time engine activity of the short gamma-ray bursts. High-energy neutrinos are efficiently produced in the jets of the prolonged activity owing to their lower Lorentz factor. The other is choked jet systems where the relativistic jets fail to penetrate the merger ejecta. In this case, photons are absorbed by the ejecta, while neutrinos escape from the system and can be detected. For both scenarios, the future project, such as IceCube-Gen2, will likely detect the neutrinos coincident with gravitational waves.

Speaker: Dr Shigeo Kimura (Tohoku University)

Slides SSK_NeutrinoFromNSNS.pdf

20 Gamma-ray Bursts: What do we learn? Multi-collision models?

Speaker: Mr Jonas Heinze (Desy Zeuthen)

Slides 2019_09_26_PAHEN_MultiColl.pdf 2019_09_26_PAHEN_MultiColl.pptx

21 Expectations for cosmogenic neutrinos from CR data

Speaker: Dr Rafael Alves Batista (University of São Paulo)

Slides rab-PAHEN-19.pdf

15:30 Coffee Break

Future perspective 1: Chair: Marek Kowalski

22 IceCube-Upgrade and IceCube-Gen2

After the discovery of high-energy cosmic neutrinos and the likely observation of a first neutrino source with the IceCube neutrino telescope, the realization of a next generation neutrino telescope at the South Pole, IceCube-Gen2, is progressing. As a first step, the IceCube detector will be upgraded with seven new strings to be deployed near the center of the existing detector during during the 2022/23 Polar season. The main goals are world-leading sensitivity to neutrino oscillation physics including tau neutrino appearance and significantly improved calibration of the existing detector which can also be applied to archival data. IceCube-Gen2 will then consist of additional ~140 strings which will instrument 8 km3 of ice with the main goal of high-energy neutrino astrophysics. The talk discusses the physics case for both detectors and presents the current project status.

Speaker: Alexander Kappes

Slides icecube_upgrade_gen2.pdf

23 Perspectives for radio detection: RNO

Speaker: Anna Nelles (HU Berlin, DESY)

Slides PAHEN_Nelles.pdf

24 The Giant Radio Array for Neutrino Detection

The Giant Radio Array for Neutrino Detection (GRAND) project aims to detect ultra-high-energy cosmic neutrinos, cosmic rays, and gamma rays with a radio antenna array deployed over a total area of 200 000 km2 in mountainous regions, in several favorable locations around the world. The strategy of GRAND is to detect air showers above 10^17 eV that are induced by the interaction of high-energy particles in the atmosphere or in the Earth crust, through its associated coherent radio-emission in the 50-200 MHz range. In its final configuration, GRAND plans to reach a sensitivity of ~10^{-10} GeV cm^-2 s^-1 sr^-1 above 5*10^{17} eV and a sub-degree angular resolution. The 300-antenna pathfinder array, GRANDProto300 is planned to be deployed in 2021. It aims at demonstrating autonomous radio detection of inclined air-showers, and make measurements of the composition and the muon content of cosmic rays around the ankle energy. In this talk, we will show preliminary designs and simulation results, plans for the ongoing, staged approach to construction, and the rich research program made possible by the proposed sensitivity and angular resolution.

Speaker: Dr Kumiko Kotera (Institut d'Astrophysique de Paris)

Slides 19_09_26_PAHEN_kotera-compressed.pdf

25 Trinity / Tau-neutrinos via air Cherenkov

Speaker: Prof. Nepomuk Otte (Georgia Institute of Technology)

Slides PAHEN2019.pdf

19:00 Dinner

Friday, 27 September

Neutrino oscillations: Chair: Gennaro Miele

26 Flavor triangles, interpretation of neutrino flavor composition

Speaker: Dr Mauricio Bustamante (Niels Bohr Institute)

Slides 2019-09-27-Bustamante-PAHEN.pdf

27 Neutrino oscillations and tau appearance at IceCube

Speaker: Dr Philipp Eller (PennState University)

Slides PAHEN_nuosc_icecube_eller.pdf

28 Earth tomography (absorption) with neutrinos

Speaker: Andrea Donini

Slides Berlin2019Donini.pdf

29 Atmospheric neutrino background

Speaker: Mary Hall Reno

Slides 4_Reno.pdf

30 Cross sections at UHE

Speaker: Amy Connolly

Slides CrossSections_PAHEN_Connolly.pdf

11:00 Coffee Break

BSM and Future perspective 2: Chair: Christian Spiering

31 ANITA events and interpretations in terms of BSM physics

Speaker: Derek Brindley Fox

32 BSM physics with atmospheric neutrinos

Speaker: Teppei Katori

Slides 2_Katori.pdf

33 KM3NeT

Speaker: Piera Sapienza

Slides 3_Sapienza.pptx

34 Baikal

Speaker: Bair Shaybonov

Slides 4_shaybonov.pdf

Closing