We present a search for a neutrino signal from dark matter self-annihilations in the Milky Way using the IceCube Neutrino Observatory (IceCube). In 1005 days of data we found no significant excess of neutrinos over the background of neutrinos produced in atmospheric air showers from cosmic ray interactions. We derive upper limits on the velocity averaged product of the dark matter self-annihilation cross section and the relative velocity of the dark matter particles â¨ÏAvâ© . Upper limits are set for dark matter particle candidate masses ranging from 10Â GeV up to 1Â TeV while considering annihilation through multiple channels. This work sets the most stringent limit on a neutrino signal from dark matter with mass between 10 and 100Â GeV, with a limit of 1.18Â·10-23cm3s-1 for 100Â GeV dark matter particles self-annihilating via Ï+Ï- to neutrinos (assuming the NavarroâFrenkâWhite dark matter halo profile).

Australia

M.G. Aartsen

Germany

M. Ackermann

New Zealand

J. Adams

Belgium

J.A. Aguilar

Denmark

M. Ahlers

Sweden

M. Ahrens

Switzerland

I. Al Samarai

D. Altmann

United States

K. Andeen

T. Anderson

I. Ansseau

G. Anton

C. Argüelles

J. Auffenberg

S. Axani

H. Bagherpour

X. Bai

Canada

J.P. Barron

S.W. Barwick

V. Baum

R. Bay

J.J. Beatty

J. Becker Tjus

K.H. Becker

S. BenZvi

D. Berley

E. Bernardini

D.Z. Besson

G. Binder

D. Bindig

E. Blaufuss

S. Blot

C. Bohm

M. Börner

F. Bos

South Korea

D. Bose

S. Böser

O. Botner

J. Bourbeau

F. Bradascio

J. Braun

L. Brayeur

M. Brenzke

H.P. Bretz

S. Bron

A. Burgman

T. Carver

J. Casey

M. Casier

E. Cheung

D. Chirkin

A. Christov

K. Clark

L. Classen

S. Coenders

G.H. Collin

J.M. Conrad

D.F. Cowen

R. Cross

M. Day

J.P.A.M. de André

C. De Clercq

J.J. DeLaunay

H. Dembinski

S. De Ridder

P. Desiati

K.D. de Vries

G. de Wasseige

M. de With

T. DeYoung

J.C. Díaz-Vélez

V. di Lorenzo

H. Dujmovic

J.P. Dumm

M. Dunkman

B. Eberhardt

T. Ehrhardt

B. Eichmann

P. Eller

P.A. Evenson

S. Fahey

A.R. Fazely

J. Felde

K. Filimonov

C. Finley

S. Flis

A. Franckowiak

E. Friedman

T. Fuchs

T.K. Gaisser

J. Gallagher

L. Gerhardt

K. Ghorbani

W. Giang

T. Glauch

T. Glüsenkamp

A. Goldschmidt

J.G. Gonzalez

D. Grant

Z. Griffith

Search for neutrinos from dark matter self-annihilations in the center of the Milky Way with 3 years of IceCube/DeepCore

We present the results of the first IceCube search for dark matter annihilation in the center of the Earth. Weakly interacting massive particles (WIMPs), candidates for dark matter, can scatter off nuclei inside the Earth and fall below its escape velocity. Over time the captured WIMPs will be accumulated and may eventually self-annihilate. Among the annihilation products only neutrinos can escape from the center of the Earth. Large-scale neutrino telescopes, such as the cubic kilometer IceCube Neutrino Observatory located at the South Pole, can be used to search for such neutrino fluxes. Data from 327Â days of detector livetime during 2011/2012 were analyzed. No excess beyond the expected background from atmospheric neutrinos was detected. The derived upper limits on the annihilation rate of WIMPs in the Earth and the resulting muon flux are an order of magnitude stronger than the limits of the last analysis performed with data from IceCubeâs predecessor AMANDA. The limits can be translated in terms of a spin-independent WIMPânucleon cross section. For a WIMP mass of 50Â GeV this analysis results in the most restrictive limits achieved with IceCube data.

K. Abraham

M. Archinger

J. Becker Tjus

A. Bernhard

M. Bissok

E. del Pino Rosendo

K.D. de Vries

S. Euler

J. Feintzeig

C.C. Fösig

L. Gladstone

M. Glagla

G. Golup

First search for dark matter annihilations in the Earth with the IceCube detector

We present the first IceCube search for a signal of dark matter annihilations in the Milky Way using all-flavour neutrino-induced particle cascades. The analysis focuses on the DeepCore sub-detector of IceCube, and uses the surrounding IceCube strings as a veto region in order to select starting events in the DeepCore volume. We use 329 live-days of data from IceCube operating in its 86-string configuration during 2011â2012. No neutrino excess is found, the final result being compatible with the background-only hypothesis. From this null result, we derive upper limits on the velocity-averaged self-annihilation cross-section, â¨ÏAvâ© , for dark matter candidate masses ranging from 30Â GeV up to 10Â TeV, assuming both a cuspy and a flat-cored dark matter halo profile. For dark matter masses between 200Â GeV and 10Â TeV, the results improve on all previous IceCube results on â¨ÏAvâ© , reaching a level of 10 -23 cm 3 s -1 , depending on the annihilation channel assumed, for a cusped NFW profile. The analysis demonstrates that all-flavour searches are competitive with muon channel searches despite the intrinsically worse angular resolution of cascades compared to muon tracks in IceCube.

C. Arguelles

T.C. Arlen

Russia

P. Berghaus

D.J. Boersma

A.H. Cruz Silva

J. Daughhetee

J.C. Davis

J.P.A.M. de André

C. De Clercq

E. del Pino Rosendo

S. De Ridder

G. de Wasseige

M. de With

V. di Lorenzo

Japan

R. Gaior

All-flavour search for neutrinos from dark matter annihilations in the Milky Way with IceCube/DeepCore

We present an improved event-level likelihood formalism for including neutrino telescope data in global fits to new physics. We derive limits on spin-dependent dark matter-proton scattering by employing the new formalism in a re-analysis of data from the 79-string IceCube search for dark matter annihilation in the Sun, including explicit energy information for each event. The new analysis excludes a number of models in the weak-scale minimal supersymmetric standard model (MSSM) for the first time. This work is accompanied by the public release of the 79-string IceCube data, as well as an associated computer code for applying the new likelihood to arbitrary dark matter models.

E. Beiser

J. Blumenthal

N. Buzinsky

A.H. Cruz Silva

M. Danninger

E. del Pino Rosendo

J. Edsjö

D. Gier

Improved limits on dark matter annihilation in the Sun with the 79-string IceCube detector and implications for supersymmetry

IceCube, a gigaton-scale neutrino detector located at the South Pole, was primarily designed to search for astrophysical neutrinos with energies of PeV and higher. This goal has been achieved with the detection of the highest energy neutrinos to date. At the other end of the energy spectrum, the DeepCore extension lowers the energy threshold of the detector to approximately 10 GeV and opens the door for oscillation studies using atmospheric neutrinos. An analysis of the disappearance of these neutrinos has been completed, with the results produced being complementary with dedicated oscillation experiments. Following a review of the detector principle and performance, the method used to make these calculations, as well as the results, is detailed. Finally, the future prospects of IceCube-DeepCore and the next generation of neutrino experiments at the South Pole (IceCube-Gen2, specifically the PINGU sub-detector) are briefly discussed.

D. Góra

Neutrino oscillation studies with IceCube-DeepCore

Various extensions of the Standard Model motivate the existence of stable magnetic monopoles that could have been created during an early high-energy epoch of the Universe. These primordial magnetic monopoles would be gradually accelerated by cosmic magnetic fields and could reach high velocities that make them visible in Cherenkov detectors such as IceCube. Equivalently to electrically charged particles, magnetic monopoles produce direct and indirect Cherenkov light while traversing through matter at relativistic velocities. This paper describes searches for relativistic ( v≥0.76c ) and mildly relativistic ( v≥0.51c ) monopoles, each using one year of data taken in 2008/2009 and 2011/2012, respectively. No monopole candidate was detected. For a velocity above 0.51c the monopole flux is constrained down to a level of 1.55×10-18cm-2s-1sr-1 . This is an improvement of almost two orders of magnitude over previous limits.

United Arab Emirates

M.L. Benabderrahmane

T. Fischer-Wasels

Searches for relativistic magnetic monopoles in IceCube

The Milky Way is expected to be embedded in a halo of dark matter particles, with the highest density in the central region, and decreasing density with the halo-centric radius. Dark matter might be indirectly detectable at Earth through a flux of stable particles generated in dark matter annihilations and peaked in the direction of the Galactic Center. We present a search for an excess flux of muon (anti-) neutrinos from dark matter annihilation in the Galactic Center using the cubic-kilometer-sized IceCube neutrino detector at the South Pole. There, the Galactic Center is always seen above the horizon. Thus, new and dedicated veto techniques against atmospheric muons are required to make the southern hemisphere accessible for IceCube. We used 319.7 live-days of data from IceCube operating in its 79-string configuration during 2010 and 2011. No neutrino excess was found and the final result is compatible with the background. We present upper limits on the self-annihilation cross-section, ÏAv , for WIMP masses ranging from 30Â GeV up to 10Â TeV, assuming cuspy (NFW) and flat-cored (Burkert) dark matter halo profiles, reaching down to â4Â·10-24 Â cm 3 Â s -1 , and â2.6Â·10-23 Â cm 3 Â s -1 for the Î½Î½Â¯ channel, respectively.

A.M. Brown

B. Christy

R. Eagan

O. Fadiran

A. Fedynitch

Search for dark matter annihilation in the Galactic Center with IceCube-79

We present the development and application of a generic analysis scheme for the measurement of neutrino spectra with the IceCube detector. This scheme is based on regularized unfolding, preceded by an event selection which uses a Minimum Redundancy Maximum Relevance algorithm to select the relevant variables and a random forest for the classification of events. The analysis has been developed using IceCube data from the 59-string configuration of the detector. 27,771 neutrino candidates were detected in 346Â days of livetime. A rejection of 99.9999Â % of the atmospheric muon background is achieved. The energy spectrum of the atmospheric neutrino flux is obtained using the TRUEE unfolding program. The unfolded spectrum of atmospheric muon neutrinos covers an energy range from 100Â GeV to 1Â PeV. Compared to the previous measurement using the detector in the 40-string configuration, the analysis presented here, extends the upper end of the atmospheric neutrino spectrum by more than a factor of two, reaching an energy region that has not been previously accessed by spectral measurements.

F. Clevermann

J. Eisch

T. Feusels

K. Frantzen

J.A. Goodman

P. Gretskov

J.C. Groh

A. Groß

C. Ha

C. Haack

A. Haj Ismail

Development of a general analysis and unfolding scheme and its application to measure the energy spectrum of atmospheric neutrinos with IceCube

Dark matter which is bound in the Galactic halo might self-annihilate and produce a flux of stable final state particles, e.g. high energy neutrinos. These neutrinos can be detected with IceCube, a cubic-kilometer sized Cherenkov detector. Given IceCubeâs large field of view, a characteristic anisotropy of the additional neutrino flux is expected. In this paper we describe a multipole method to search for such a large-scale anisotropy in IceCube data. This method uses the expansion coefficients of a multipole expansion of neutrino arrival directions and incorporates signal-specific weights for each expansion coefficient. We apply the technique to a high-purity muon neutrino sample from the Northern Hemisphere. The final result is compatible with the null-hypothesis. As no signal was observed, we present limits on the self-annihilation cross-section averaged over the relative velocity distribution â¨ÏAvâ© down to 1.9Ã10-23cm3s-1 for a dark matter particle mass of 700â1,000Â GeV and direct annihilation into Î½Î½Â¯ . The resulting exclusion limits come close to exclusion limits from Î³ -ray experiments, that focus on the outer Galactic halo, for high dark matter masses of a few TeV and hard annihilation channels.

D.T. Grandmont

P. Hallen

Multipole analysis of IceCube data to search for dark matter accumulated in the Galactic halo