BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Multi-Messenger Tests for the Origin of Cosmic High-Energy Neutrin os DTSTART;VALUE=DATE-TIME:20151026T054000Z DTEND;VALUE=DATE-TIME:20151026T060000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-844@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Kohta Murase (Penn State University)\nI review vario us scenarios for the origin of high-energy cosmic neutrinos\, and show how multi-messenger data can be utilized to constrain the models. I discuss t he present implications and prospects for the future observation.\n\nhttps ://indico.icrr.u-tokyo.ac.jp/event/23/contributions/844/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/844/ END:VEVENT BEGIN:VEVENT SUMMARY:Searches for high energy neutrinos and gravitational waves: recent results in data from the LIGO and Virgo detectors and expectations for th e Advanced Detector Era DTSTART;VALUE=DATE-TIME:20151029T092500Z DTEND;VALUE=DATE-TIME:20151029T094000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-847@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Di Palma Irene (University of Rome\, "La Sapienza")\ nMany of the astrophysical sources and violent phenomena observed in our U niverse are potential emitters of gravitational waves and high energy neut rinos. Both these probes are\ncosmic messengers that may escape much dense r media than photons. LIGO and Virgo scientific collaborations have carrie d out joint searches for gravitational waves and high energy neutrinos fro m IceCube and ANTARES neutrino detectors. I report the results of these co incident analyses and present plans and expectations for the Advanced Dete ctor Era.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/847/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/847/ END:VEVENT BEGIN:VEVENT SUMMARY:Results of the ARAcalTA experiment: measurement of the coherent ra dio emission from an electron excess in ice. DTSTART;VALUE=DATE-TIME:20151026T063000Z DTEND;VALUE=DATE-TIME:20151026T064500Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-854@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Romain Gaior (Chiba University)\nThe Askaryan Radio Array is a neutrino radio detector array being\nbuilt at the south p ole. It aims at the observation of cosmic ultra\nhigh energy neutrino (E > 10PeV) via the coherent radio waves emitted\nfrom the charge excess in the cascade induced after the interaction of\nthe neutrinos in ice. The radio signal expected by ARA rely mostly on\nthe simulation of the emissi on process\, the Askaryan radiation\, and\nthe detector response. In or der to verify both of these aspects\, we\nset up a replica of ARA ex periment\, ARAcalTA\, using the 40 MeV\nelectron beam of the Electron Light Source facility at Telescope Array\nsite. Electron bunches were s hot in a block of ice to produce an\nelectromagnetic shower and the re sulting radiation was collected with\nARA sensors. Parameters such as c oherence\, polarization ratio and\nangular distribution were measured. The difficulty in this experiment\ncomes from the estimation of the possible background such as\ntransition radiation and the radiation from the beam appearance.\nAfter describing the experimental setup a nd the presentation of the\nmain measurements\, we will interpret our r esults in the light of the\nsimulation of the various emission process.\n \nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/854/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/854/ END:VEVENT BEGIN:VEVENT SUMMARY:KM3NeT: Neutrino astronomy and oscillation research in the Mediter ranean Sea DTSTART;VALUE=DATE-TIME:20151026T050000Z DTEND;VALUE=DATE-TIME:20151026T052000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-866@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Veronique Van Elewyck (APC)\nThe KM3NeT Collaboratio n is currently constructing the first phase of a\nnext-generation neutrino telescope on two sites in the Mediterranean\nSea: KM3NeT-FR near Toulon ( France)\, and KM3NeT-IT near Capo Passero in\nSicily (Italy). Each site wi ll host a three-dimensional array of\nthousands of photosensors that will detect the Cherenkov light resulting\nfrom neutrino interactions in the vi cinity of the detector. The KM3NeT\ndetector relies on a novel design for its Digital Optical Modules\,\nhousing 31 three-inch photomultiplier tubes enclosed in a glass sphere\,\nwhich provide enhanced photon counting and directionality performances.\n\nTwo configurations have been defined that are optimised for studies in\ndifferent ranges of energy. KM3NeT-FR will be mainly dedicated to the\nstudy of oscillation effects and the measureme nt of the neutrino mass\nhierarchy with ~GeV atmospheric neutrinos (ORCA). KM3NeT-IT will focus\non high-energy (TeV-PeV) neutrino astronomy\, aimin g at the exploration\nof the all-flavour neutrino sky with unprecedented r esolution (ARCA).\n\nThis contribution will present the status of the firs t phase of the\nKM3NeT detector implementation\, and survey the physics po tentialities of the telescope with respect to its twofold aim.\n\nhttps:// indico.icrr.u-tokyo.ac.jp/event/23/contributions/866/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/866/ END:VEVENT BEGIN:VEVENT SUMMARY:Status and prospects for the Askaryan Radio Array (ARA) cosmogenic neutrino detector DTSTART;VALUE=DATE-TIME:20151026T061500Z DTEND;VALUE=DATE-TIME:20151026T063000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-896@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Michael DuVernois (University of Wisconsin-Madison)\ nThe Askaryan Radio Array (ARA) is an ultra-high energy (>100 PeV) cosmic neutrino detector which is in phased construction near the South Pole. ARA searches for radio Cherenkov-like emission from particle cascades induced by neutrino interactions in the ice using radio frequency antennas (~150- 800MHz) deployed at a design depth of 200m in the Antarctic ice. A prototy pe ARA Testbed station was deployed at ~30m depth in the 2010-2011 season and the first three full ARA stations were deployed in the 2011-2012 and 2 012-2013 seasons. We present the status of the array and plans for the nea r-term construction of a full ARA-37 detector with profound discovery pote ntial for most models of cosmogenic neutrinos from 100 PeV to 100 EeV in e nergy.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/896/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/896/ END:VEVENT BEGIN:VEVENT SUMMARY:Neutrino Flavor Ratios Modified by Cosmic Ray Secondary-accelerati on DTSTART;VALUE=DATE-TIME:20151029T084000Z DTEND;VALUE=DATE-TIME:20151029T085500Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-900@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Norita Kawanaka (The University of Tokyo)\nAccelerat ion of 's and 's modies the flavor ratio at Earth (at astrophysical source s) of\nneutrinos produced by pion decay\, nu_e : nu_mu : nu_tau \, from 1 : 1 : 1 (1 : 2 : 0) to 1 : 1:8 : 1:8 (0 : 1 : 0) at high energy\, because pions decay more than muons during secondary-acceleration. The neutrino s pectrum accompanies a flat excess\, differently from the case of energy lo sses. With the flavor spectra\, we can probe timescales of cosmic-ray acce leration and shock dynamics. We obtain general solutions of convection-dif fusion equations and apply to gamma-ray bursts\, which may have the flavor modication at around PeV - EeV detectable by IceCube and next-generation experiments.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/9 00/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/900/ END:VEVENT BEGIN:VEVENT SUMMARY:High-Energy Neutrinos from Fast-spinning Newborn Pulsars DTSTART;VALUE=DATE-TIME:20151029T091000Z DTEND;VALUE=DATE-TIME:20151029T092500Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-902@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Ke Fang (University of Chicago)\nFast-spinning newbo rn pulsars are promising sources of ultrahigh energy cosmic rays (UHECRs). With proper injection abundances\, integrated cosmic rays from the extrag alactic pulsar population can match UHE observation in all aspects - energ y spectrum\, chemical composition\, and anisotropy. High-energy neutrinos would be produced unavoidably\, when accelerated UHECRs travel through the supernova envelope surrounding the pulsar. In this talk\, we will invest igate this neutrino production process\, including the hadronuclear intera ction between cosmic rays and the background\, and possible suppression du e to the pion interaction. We will report the spectrum\, flux and flavor r atio of the high-energy neutrinos from pulsars\, and compare their detect ability to sensitivities of current and future experiments. Finally\, we w ill discuss our model dependence on the source emissivity\, the distribut ion of pulsar population at birth\, as well as the injection composition o f cosmic rays.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions /902/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/902/ END:VEVENT BEGIN:VEVENT SUMMARY:High-energy Particle Emission and Cumulative Background from Low- Luminosity Active Galactic Nuclei DTSTART;VALUE=DATE-TIME:20151029T085500Z DTEND;VALUE=DATE-TIME:20151029T091000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-906@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Shigeo KIMURA (Tohoku University)\nThe origin of hig h-energy neutrinos detected by the IceCube neutrino telescope is a big mys tery of high-energy astrophysics. We propose low-luminosity active galacti c nuclei (LLAGNs) as a novel source of the high-energy neutrinos. The radi ation inefficient accretion flows (RIAFs) are believed to exist in LLAGNs. The Coulomb collisions inside RIAFs is so inefficient that plasmas natura lly have high-energy protons through the stochastic particle acceleration. We calculate spectra of escaping neutrinos and cosmic-ray (CR) protons\, and find that the RIAFs in LLAGNs can accelerate protons up to ~ PeVs and emit TeV–PeV neutrinos via pp and/or pγ reactions. If ~ 1% of the accre tion luminosity is carried away by non-thermal protons\, the diffuse neutr ino intensity from the RIAFs in LLAGN can be compatible with the observed IceCube data (Kimura\, Murase & Toma 2015\, ApJ\, 806\, 159). This result does not contradict either of the diffuse gamma-ray background observed by Fermi or observed diffuse CR flux. This model can be tested by gamma-ray observations around the cores of LLAGNs (e.g.\, Fujita\, Kimura\, Murase 2015\, PRD\, 92\, 023001).\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/c ontributions/906/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/906/ END:VEVENT BEGIN:VEVENT SUMMARY:Recent results from the ANTARES deep-sea neutrino telescope DTSTART;VALUE=DATE-TIME:20151029T075000Z DTEND;VALUE=DATE-TIME:20151029T081000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-926@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Rodrigo Gracia Ruiz (APC)\nThe ANTARES detector\, lo cated in the deep Mediterranean sea off the coast of Toulon (France)\, is the first deep-sea neutrino telescope and has been running in its final co nfiguration since 2008. It consists of a 3D array of 885 photomultipliers distributed on 12 lines anchored on the sea bed\, that detect the Cherenko v light induced by upward-going charged leptons produced by neutrino inter actions in and around the detector.\n\nThe primary goal of ANTARES is to s earch for astrophysical neutrinos in the TeV-PeV range. This comprises gen eric searches for any diffuse cosmic neutrino flux as well as more specifi c searches for astrophysical sources such as active galactic nuclei or Gal actic sources. The search program also includes multi-messenger analyses r equiring time and/or space coincidences with other cosmic probes (cosmic r ays\, gamma rays or gravitational waves).\n\nThanks to its location in the Northern hemisphere and its excellent pointing accuracy\, ANTARES is a pr ivileged observer of the central part of our galaxy. This allows it to pu t interesting constraints on the origin of the signal reported by the IceC ube collaboration. The ANTARES sensitivity is also high enough to study a wide-range of other phenomena\, from atmospheric neutrino oscillations to dark matter annihilation or potential exotics such as nuclearites and magn etic monopoles. \n\nThis contribution will present the most recent results obtained by the collaboration in the fields mentioned above.\n\nhttps://i ndico.icrr.u-tokyo.ac.jp/event/23/contributions/926/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/926/ END:VEVENT BEGIN:VEVENT SUMMARY:Observations of the diffuse astrophysical neutrino flux with IceCu be DTSTART;VALUE=DATE-TIME:20151029T073000Z DTEND;VALUE=DATE-TIME:20151029T075000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-928@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Jakob van Santen (DESY Zeuthen)\nIceCube is a cubic- kilometer neutrino observatory buried deep in the ice sheet\nat the geogra phic South Pole. The data from its first few years of operation\nhave reve aled an excess of high-energy neutrino events in multiple detection\nchann els that is incompatible with purely atmospheric origins\, which we\ninter pret as evidence for a flux of neutrinos from unresolved astrophysical\nso urces. At the same time\, no point sources of neutrinos have been detected .\nThis talk will provide an overview of IceCube's constraints on the ener gy\nspectrum and neutrino flavor composition of the diffuse astrophysical neutrino\nflux.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contribution s/928/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/928/ END:VEVENT BEGIN:VEVENT SUMMARY:A measurement of the diffuse astrophysical muon neutrino flux usin g six years of IceCube data DTSTART;VALUE=DATE-TIME:20151029T082500Z DTEND;VALUE=DATE-TIME:20151029T084000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-951@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Sebastian Schoenen (RWTH Aachen\, 3. Physikalisches Institut B)\nThe IceCube Collaboration has observed a high-energy astrophy sical neutrino flux using neutrino candidates with interaction vertices co ntained within the instrumented volume. A complementary measurement can be done with charged current muon neutrinos where the interaction vertex can be outside the instrumented volume. Due to the large muon range the effec tive area is significantly larger but the field of view is limited to the northern hemisphere. IceCube data from 2009 through 2015 have been analyze d by a likelihood approach with reconstructed muon energy and zenith angle as observables. The analyzed data consist of about 340\,000 muon neutrino candidates with a negligible contribution of atmospheric muons. While the majority of these events are atmospheric neutrinos\, the highest energy e vents are incompatible with that interpretation. In this talk we will pres ent the observation of an astrophysical muon neutrino flux and the measure ment of its properties.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/cont ributions/951/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/951/ END:VEVENT BEGIN:VEVENT SUMMARY:TeV Gamma rays with ICAL-INO DTSTART;VALUE=DATE-TIME:20151026T064500Z DTEND;VALUE=DATE-TIME:20151026T070000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-957@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: REETANJALI MOHARANA (University of Johannesburg)\nTh e feasibility of the detection of TeV gamma-rays from astrophysical object s has been carried out using the INO-ICAL detector. The detection of very high energy gamma-rays has been followed by the detection of down going m uons produced through the electromagnetic showers initiated by gamma-ray in the atmosphere. As the produced muons through this process are of same charge ratio\, they might be result in the enhancement of mu+ to mu- rati o at very high energy ( above 100 GeV). The ICAL detector is proposed to b e a magnetised calorimeter with an average magnetic field of nearly 1.3 T. So the signature of gamma-rays could be addressed very easily through thi s technique.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/9 57/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/957/ END:VEVENT BEGIN:VEVENT SUMMARY:IceCube Cosmic Neutrino events from Star-forming galaxies. DTSTART;VALUE=DATE-TIME:20151029T081000Z DTEND;VALUE=DATE-TIME:20151029T082500Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-959@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: REETANJALI MOHARANA (University of Johannesburg)\nSo urces of the 53 high energy neutrino events detected by IceCube with energ y between 20 TeV and 2.7 PeV is one of the outstanding puzzles in recent y ears. Suggestions range from Galactic to extragalactic sources\, and from standard model interactions to dark matter decay or annihilation. We perfo rm a statistical analysis of the distribution of these neutrino events and astrophysical sources. Our results suggest correlation between the IceCub e neutrino events and star forming galaxies with at least 3-sigma signific ance. We also perform a multi-messenger study of gamma rays and neutrinos from these sources and constrain star formation rate and environment param eters based observations.\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/co ntributions/959/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/959/ END:VEVENT BEGIN:VEVENT SUMMARY:The landscape of flavor composition of high-energy astrophysical n eutrinos DTSTART;VALUE=DATE-TIME:20151026T052000Z DTEND;VALUE=DATE-TIME:20151026T054000Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-964@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Mauricio Bustamante (Center for Cosmology and Astrop article Physics\, The Ohio State University)\nIceCube has confirmed the ex istence of the long-sought high-energy astrophysical neutrinos. Recently\, the flavor composition of the diffuse flux\, that is\, the proportion of electron-\, muon-\, and tau-flavor in it\, was measured for the first time . This rich observable can reveal information about physical conditions in the production\, propagation\, and detection of neutrinos\, including whe ther there is new physics involved. We present theoretical expectations fo r the flavor composition at Earth by exploring all possible flavor composi tions that leave the astrophysical sources. We explicitly show that the re gion of accessible flavor composition at Earth is surprisingly small\, reg ardless of the neutrino mass hierarchy and of the experimental uncertainty on the mixing parameters. This remains true even in the presence of a bro ad class of new physics effects during propagation. Furthermore\, we are a ble to clearly identify what regions of the flavor space can be accessed o nly by new physics\, and of what type. In particular\, in the case of neut rino decay under a normal mass hierarchy\, we demonstrate the usefulness o f the flavor composition by using the present IceCube results to improve t he bounds on neutrino lifetimes by several orders of magnitude. The planne d volume upgrade\, IceCube-Gen2\, would be able to strengthen these claims .\n\nhttps://indico.icrr.u-tokyo.ac.jp/event/23/contributions/964/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/964/ END:VEVENT BEGIN:VEVENT SUMMARY:Enhanced sensitivity to astrophysical neutrinos with a surface vet o array above IceCube DTSTART;VALUE=DATE-TIME:20151026T060000Z DTEND;VALUE=DATE-TIME:20151026T061500Z DTSTAMP;VALUE=DATE-TIME:20260907T032713Z UID:indico-contribution-244-970@indico.icrr.u-tokyo.ac.jp DESCRIPTION:Speakers: Delia Tosi (University of Wisconsin - Madison and WI PAC)\nThe IceCube neutrino observatory features a kilometer-cubed deep det ector and a surface component\, IceTop\, instrumenting the square-kilomete r footprint of the detector. IceTop consists of ice-filled tanks equipped with optical sensors capable of detecting charged particles produced in ai r showers. Besides measuring the cosmic-ray spectrum and composition\, Ice Top can be used as a veto for IceCube. With the discovery of an astrophysi cal flux at high energy\, this role is becoming more important as a pathwa y to the design of a larger surface array. Since the earth is not transpar ent to very-high-energy neutrinos\, searching for a signal from the southe rn hemisphere is a priority. This search\, however\, requires suppressing a large background consisting of penetrating atmospheric muons and neutri nos. A surface array\, such as IceTop\, can reduce the background by ident ifying particles which are generated in the same air shower as the muons i n the deep detector. I will present the capabilities and limitations of I ceTop as a veto for cosmic rays as well as the status of simulations of va rious designs for an upgraded surface array.\n\nhttps://indico.icrr.u-toky o.ac.jp/event/23/contributions/970/ LOCATION: Room 3.4 URL:https://indico.icrr.u-tokyo.ac.jp/event/23/contributions/970/ END:VEVENT END:VCALENDAR