Open Questions in Cosmic-Ray Research at Ultrahigh Energies

Rafael Alves Batista; Jonathan Biteau; Mauricio Bustamante; Klaus Dolag; Ralph Engel; Ke Fang; Karl-Heinz Kampert; Dmitriy Kostunin; Miguel Mostafa; Kohta Murase; Günter Sigl; Foteini Oikonomou; Angela V. Olinto; Mikhail I. Panasyuk; Andrew Taylor; Michael Unger

doi:10.3389/fspas.2019.00023

Open Questions in Cosmic-Ray Research at Ultrahigh Energies

Rafael Alves Batista, Jonathan Biteau, Mauricio Bustamante, Klaus Dolag, Ralph Engel, Ke Fang, Karl-Heinz Kampert, Dmitriy Kostunin, Miguel Mostafa, Kohta Murase, Günter Sigl, Foteini Oikonomou, Angela V. Olinto, Mikhail I. Panasyuk, Andrew Taylor, Michael Unger

Theoretical high energy, astroparticle and gravitational physics

31 Citations (Scopus)

Abstract

We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies. We also briefly overview upcoming and proposed UHECR experiments and discuss their projected science reach.

Original language	English
Journal	Frontiers in Astronomy and Space Sciences
ISSN	2296-987X
DOIs	https://doi.org/10.3389/fspas.2019.00023
Publication status	Published - 4 Jun 2019

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title = "Open Questions in Cosmic-Ray Research at Ultrahigh Energies",

abstract = "We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies. We also briefly overview upcoming and proposed UHECR experiments and discuss their projected science reach.",

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author = "Batista, {Rafael Alves} and Jonathan Biteau and Mauricio Bustamante and Klaus Dolag and Ralph Engel and Ke Fang and Karl-Heinz Kampert and Dmitriy Kostunin and Miguel Mostafa and Kohta Murase and G{\"u}nter Sigl and Foteini Oikonomou and Olinto, {Angela V.} and Panasyuk, {Mikhail I.} and Andrew Taylor and Michael Unger",

note = "47 pages, 17 figures, Review to appear in {"}Frontiers in Astronomy and Space Science{"} special issue, {"}Multi-Messenger Astrophysics: New Windows to the Universe{"}",

year = "2019",

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doi = "10.3389/fspas.2019.00023",

language = "English",

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TY - JOUR

T1 - Open Questions in Cosmic-Ray Research at Ultrahigh Energies

AU - Batista, Rafael Alves

AU - Biteau, Jonathan

AU - Bustamante, Mauricio

AU - Dolag, Klaus

AU - Engel, Ralph

AU - Fang, Ke

AU - Kampert, Karl-Heinz

AU - Kostunin, Dmitriy

AU - Mostafa, Miguel

AU - Murase, Kohta

AU - Sigl, Günter

AU - Oikonomou, Foteini

AU - Olinto, Angela V.

AU - Panasyuk, Mikhail I.

AU - Taylor, Andrew

AU - Unger, Michael

N1 - 47 pages, 17 figures, Review to appear in "Frontiers in Astronomy and Space Science" special issue, "Multi-Messenger Astrophysics: New Windows to the Universe"

PY - 2019/6/4

Y1 - 2019/6/4

N2 - We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies. We also briefly overview upcoming and proposed UHECR experiments and discuss their projected science reach.

AB - We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies. We also briefly overview upcoming and proposed UHECR experiments and discuss their projected science reach.

KW - astro-ph.HE

U2 - 10.3389/fspas.2019.00023

DO - 10.3389/fspas.2019.00023

M3 - Journal article

SN - 2296-987X

JO - Frontiers in Astronomy and Space Sciences

JF - Frontiers in Astronomy and Space Sciences

ER -

Open Questions in Cosmic-Ray Research at Ultrahigh Energies

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