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BETA
Pérez de los Heros, CarlosORCID iD iconorcid.org/0000-0002-2084-5866
Alternative names
Publications (10 of 281) Show all publications
Betti, M. G., Biasotti, M., Bosca, A., Calle, F., Carabe-Lopez, J., Cavoto, G., . . . Zurek, K. M. (2019). A design for an electromagnetic filter for precision energy measurements at the tritium endpoint. Progress in Particle and Nuclear Physics, 106, 120-131
Open this publication in new window or tab >>A design for an electromagnetic filter for precision energy measurements at the tritium endpoint
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2019 (English)In: Progress in Particle and Nuclear Physics, ISSN 0146-6410, E-ISSN 1873-2224, Vol. 106, p. 120-131Article, review/survey (Refereed) Published
Abstract [en]

We present a detailed description of the electromagnetic filter for the PTOLEMY project to directly detect the Cosmic Neutrino Background (CNB). Starting with an initial estimate for the orbital magnetic moment, the higher-order drift process of E x B is configured to balance the gradient-B drift motion of the electron in such a way as to guide the trajectory into the standing voltage potential along the mid-plane of the filter. As a function of drift distance along the length of the filter, the filter zooms in with exponentially increasing precision on the transverse velocity component of the electron kinetic energy. This yields a linear dimension for the total filter length that is exceptionally compact compared to previous techniques for electromagnetic filtering. The parallel velocity component of the electron kinetic energy oscillates in an electrostatic harmonic trap as the electron drifts along the length of the filter. An analysis of the phase-space volume conservation validates the expected behavior of the filter from the adiabatic invariance of the orbital magnetic moment and energy conservation following Liouville's theorem for Hamiltonian systems. (C) 2019 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV, 2019
Keywords
PTOLEMY, Relic neutrino, Cosmic Neutrino Background, CNB, Neutrino mass, Transverse drift filter
National Category
Condensed Matter Physics
Identifiers
urn:nbn:se:uu:diva-383047 (URN)10.1016/j.ppnp.2019.02.004 (DOI)000464490900003 ()
Available from: 2019-05-13 Created: 2019-05-13 Last updated: 2019-05-13Bibliographically approved
Abeysekara, A. U., Botner, O., Burgman, A., Hallgren, A., Pérez de los Heros, C., Unger, E. & Yuan, T. (2019). All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field. Astrophysical Journal, 871(1), Article ID 96.
Open this publication in new window or tab >>All-sky Measurement of the Anisotropy of Cosmic Rays at 10 TeV and Mapping of the Local Interstellar Magnetic Field
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2019 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 871, no 1, article id 96Article in journal (Refereed) Published
Abstract [en]

We present the first full-sky analysis of the cosmic ray arrival direction distribution with data collected by the High-Altitude Water Cherenkov and IceCube observatories in the northern and southern hemispheres at the same median primary particle energy of 10 TeV. The combined sky map and angular power spectrum largely eliminate biases that result from partial sky coverage and present a key to probe into the propagation properties of TeV cosmic rays through our local interstellar medium and the interaction between the interstellar and heliospheric magnetic fields. From the map, we determine the horizontal dipole components of the anisotropy delta(0h) = 9.16 x 10(-4) and delta(6h) = 7.25 x 10(-4) (+/- 0.04 x 10(-4)). In addition, we infer the direction (229 degrees.2 +/- 3 degrees.5 R.A., 11 degrees.4 +/- 3 degrees.0 decl.) of the interstellar magnetic field from the boundary between large-scale excess and deficit regions from which we estimate the missing corresponding vertical dipole component of the large-scale anisotropy to be delta(N) similar to -3.97(-2.0)(+1.0) x 10(-4).

Keywords
astroparticle physics, cosmic rays, ISM: magnetic fields
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-377359 (URN)10.3847/1538-4357/aaf5cc (DOI)000456837000045 ()
Funder
German Research Foundation (DFG)Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationDanish National Research Foundation
Note

IceCube collaboration, for complete list of authors and funding information see http://dx.doi.org/10.3847/1538-4357/aaf5cc

Available from: 2019-02-19 Created: 2019-02-19 Last updated: 2019-05-21Bibliographically approved
Backstrom, A., Catena, R. & Pérez de los Heros, C. (2019). Assessing the sensitivity of PINGU to effective dark matter-nucleon interactions. Journal of Cosmology and Astroparticle Physics (5), Article ID 023.
Open this publication in new window or tab >>Assessing the sensitivity of PINGU to effective dark matter-nucleon interactions
2019 (English)In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 5, article id 023Article in journal (Refereed) Published
Abstract [en]

We calculate the sensitivity of next generation neutrino telescopes to the 28 (isoscalar and isovector) coupling constants defining the non-relativistic effective theory of (spin 1/2) dark matter (DM)-nucleon interactions. We take as a benchmark detector the proposed Precision IceCube Next Generation Upgrade (PINGU), although our results are valid for any other neutrino telescope of similar effective volume. We express PINGU's sensitivity in terms of 5 sigma sensitivity contours in the DM mass-coupling constant plane, and compare our sensitivity contours with the 90% C.L. exclusion limits on the same coupling constants that we obtain from a reanalysis of the null result of current DM searches at IceCube/DeepCore. We find that PINGU can effectively probe not only the canonical spin-independent and spin-dependent DM-nucleon interactions, but also some of the velocity-dependent or momentum-dependent interactions that generate DM-nucleus scattering cross sections scaling like the number of nucleons squared. We also find that PINGU's 5 sigma sensitivity contours are significantly below current IceCube/DeepCore 90% C.L. exclusion limits when b (b) over bar is the leading DM annihilation channel. This result shows the importance of lowering the experimental energy threshold when probing models that generate soft neutrino energy spectra, and holds true independently of the assumed DM-nucleon interaction and for all DM masses tested here. When DM primarily annihilates into tau(tau) over bar, a PINGU-like detector will improve upon current exclusion limits for DM masses below 30 GeV, independently of the assumed DM-nucleon interaction.

Keywords
dark matter theory, dark matter experiments
National Category
Astronomy, Astrophysics and Cosmology Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-387297 (URN)10.1088/1475-7516/2019/05/023 (DOI)000467933500003 ()
Funder
Knut and Alice Wallenberg Foundation
Available from: 2019-06-24 Created: 2019-06-24 Last updated: 2019-06-24Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Yuan, T. (2019). Constraints on Minute-Scale Transient Astrophysical Neutrino Sources. Physical Review Letters, 122(5), Article ID 051102.
Open this publication in new window or tab >>Constraints on Minute-Scale Transient Astrophysical Neutrino Sources
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2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 5, article id 051102Article in journal (Refereed) Published
Abstract [en]

High-energy neutrino emission has been predicted for several short-lived astrophysical transients including gamma-ray bursts (GRBs), core-collapse supernovae with choked jets, and neutron star mergers. IceCube's optical and x-ray follow-up program searches for such transient sources by looking for two or more muon neutrino candidates in directional coincidence and arriving within 100 s. The measured rate of neutrino alerts is consistent with the expected rate of chance coincidences of atmospheric background events and no likely electromagnetic counterparts have been identified in Swift follow-up observations. Here, we calculate generic bounds on the neutrino flux of short-lived transient sources. Assuming an E-2.5 neutrino spectrum, we find that the neutrino flux of rare sources, like long gamma-ray bursts, is constrained to < 5% of the detected astrophysical flux and the energy released in neutrinos (100 GeV to 10 PeV) by a median bright GRB-like source is < 10(52.5) erg. For a harder E-2.13 neutrino spectrum up to 30% of the flux could be produced by GRBs and the allowed median source energy is < 10(52) erg. A hypothetical population of transient sources has to be more common than 10(-5) Mpc(-3) yr(-1) (5 x 10(-8) Mpc(-3) yr(-1) for the E-2.13 spectrum) to account for the complete astrophysical neutrino flux.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2019
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-378535 (URN)10.1103/PhysRevLett.122.051102 (DOI)000458147300005 ()
Funder
German Research Foundation (DFG)Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationAustralian Research Council
Available from: 2019-03-22 Created: 2019-03-22 Last updated: 2019-05-21Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Yuan, T. (2019). Detection of the Temporal Variation of the Sun's Cosmic Ray Shadow with the IceCube Detector. Astrophysical Journal, 872(2), Article ID 133.
Open this publication in new window or tab >>Detection of the Temporal Variation of the Sun's Cosmic Ray Shadow with the IceCube Detector
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2019 (English)In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 872, no 2, article id 133Article in journal (Refereed) Published
Abstract [en]

We report on the observation of a deficit in the cosmic ray flux from the directions of the Moon and Sun with five years of data taken by the IceCube Neutrino Observatory. Between 2010 May and 2011 May the IceCube detector operated with 79 strings deployed in the glacial ice at the South Pole, and with 86 strings between 2011 May and 2015 May. A binned analysis is used to measure the relative deficit and significance of the cosmic ray shadows. Both the cosmic ray Moon and Sun shadows are detected with high statistical significance (>10σ) for each year. The results for the Moon shadow are consistent with previous analyses and verify the stability of the IceCube detector over time. This work represents the first observation of the Sun shadow with the IceCube detector. We show that the cosmic ray shadow of the Sun varies with time. These results make it possible to study cosmic ray transport near the Sun with future data from IceCube.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD, 2019
Keywords
cosmic rays, ISM: magnetic fields, Moon, Sun: activity, sunspots
National Category
Subatomic Physics Astronomy, Astrophysics and Cosmology
Identifiers
urn:nbn:se:uu:diva-378982 (URN)10.3847/1538-4357/aaffd1 (DOI)000459242200018 ()
Available from: 2019-03-19 Created: 2019-03-19 Last updated: 2019-05-21Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Zoll, M. (2019). Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data. European Physical Journal C, 79(3), Article ID 214.
Open this publication in new window or tab >>Erratum to: Search for annihilating dark matter in the Sun with 3 years of IceCube data
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2019 (English)In: European Physical Journal C, ISSN 1434-6044, E-ISSN 1434-6052, Vol. 79, no 3, article id 214Article in journal (Other academic) Published
National Category
Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-380661 (URN)10.1140/epjc/s10052-019-6702-y (DOI)000460819300003 ()
Funder
German Research Foundation (DFG)Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationSwedish National Infrastructure for Computing (SNIC)Danish National Research FoundationSwedish Polar Research SecretariatAustralian Research Council
Note

Correction of: European Physical Journal C, vol. 77, issue 3, article Number: 146. DOI: 10.1140/epjc/s10052-017-4689-9

Available from: 2019-04-01 Created: 2019-04-01 Last updated: 2019-05-21Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Yuan, T. (2019). Measurement of atmospheric tau neutrino appearance with IceCube DeepCore. Physical Review D: covering particles, fields, gravitation, and cosmology, 99(3), Article ID 032007.
Open this publication in new window or tab >>Measurement of atmospheric tau neutrino appearance with IceCube DeepCore
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2019 (English)In: Physical Review D: covering particles, fields, gravitation, and cosmology, ISSN 2470-0010, E-ISSN 2470-0029, Vol. 99, no 3, article id 032007Article in journal (Refereed) Published
Abstract [en]

We present a measurement of atmospheric tau neutrino appearance from oscillations with three years of data from the DeepCore subarray of the IceCube Neutrino Observatory. This analysis uses atmospheric neutrinos from the full sky with reconstructed energies between 5.6 and 56 GeV to search for a statistical excess of cascadelike neutrino events which are the signature of nu(tau) interactions. For CC thorn NC (CC-only) interactions, we measure the tau neutrino normalization to be 0.73(-0.24)(+0.30) (0.57(-0.30)(+0.36)) and exclude the absence of tau neutrino oscillations at a significance of 3.2 sigma (2.0 sigma) These results are consistent with, and of similar precision to, a confirmatory IceCube analysis also presented, as well as measurements performed by other experiments.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC, 2019
National Category
Astronomy, Astrophysics and Cosmology Subatomic Physics
Identifiers
urn:nbn:se:uu:diva-378370 (URN)10.1103/PhysRevD.99.032007 (DOI)000458818300005 ()
Funder
German Research Foundation (DFG)Swedish Research CouncilSwedish National Infrastructure for Computing (SNIC)Knut and Alice Wallenberg FoundationAustralian Research CouncilSwedish Polar Research Secretariat
Available from: 2019-03-07 Created: 2019-03-07 Last updated: 2019-03-07Bibliographically approved
Aartsen, M. G., Ackermann, M., Adams, J., Aguilar, J. A., Ahlers, M., Ahrens, M., . . . Yuan, T. (2019). Measurements using the inelasticity distribution of multi-TeV neutrino interactions in IceCube. Physical Review D: covering particles, fields, gravitation, and cosmology, 99(3), Article ID 032004.
Open this publication in new window or tab >>Measurements using the inelasticity distribution of multi-TeV neutrino interactions in IceCube