WG5: Cosmic rays

Contacts | Objectives |Tasks | Milestones | Members | Talks | Related works


Group Leader: Armando di Matteo (INFN Torino, Turin, Italy)
Group Vice-Leader: Günter Sigl (University of Hamburg, Germany)

Objectives (shared with WG4, WG5 and WG6)

To analyze the current state of the art of the experimental astronomy of each type of cosmic messenger with respect to the Action’s challenge and identify opportunities for improving the analysis strategies which are currently being followed, in the light of the theoretical frameworks and considerations of WG1 and WG2. To provide WG1 and WG2 with the technical details related to the detection of each type of astrophysical messenger, which need to be considered for a correct phenomenological and theoretical interpretation of the experimental results. To develop new analysis strategies that combine the observations of gamma rays, cosmic rays, neutrinos and gravitational waves for the search of quantum gravity signatures in the framework of multi-messenger astronomy. These new
strategies should be developed in close cooperation with WG1 and specially with WG2. Finally, these WGs will transfer the Action’s motivations, progress and results, to their respective communities of experimentalists to promote their interest on the Action’s challenge.


  • Tackle the problem of the possibility of observing quantum gravity (QG) effects in the propagation of ultra-high-energy cosmic rays (UHECRs), given the experimental observation of a high-energy suppression in the all-particle spectrum
  • Consider the implications of QG phenomenology in the extragalactic electromagnetic cascades produced in the propagation of UHECRs, clarifying the different implications of Lorentz invariance violation (LIV) and deformed special relativity (DSR) frameworks
  • Study the effects of QG phenomenology on the production processes of UHECRs, also relating the observed spectrum with that of the (possible) associated messengers (e.g. neutrinos and gamma rays)
  • Consider the possibility of deriving limits for LIV and DSR parameters from the modifications in the development of the extensive air showers initiated by high-energy cosmic rays in the Earth’s atmosphere, also relating these effects to the excess of muons in observed air showers as compared to simulations.


  • Year 1: Review, improve and update the already existing searches for quantum gravity signatures through cosmic rays measurements.
  • Year 2: Constrain QG phenomenology from the available experimental data in the different cases of LIV and DSR.
  • Year 3: Definition of new analysis strategies taking into account the theoretical frameworks developed in WG1 and WG2.
  • Year 4: Development of multi-messenger search strategies based on the phenomenological models developed by WG1 and WG2.

Joint WG3-WG4-WG5-WG6 deliverables and activities

  • Publicly available web page with results of LIV studies based on each cosmic messenger.
  • Optimal strategy and method for performing LIV studies (including future experiments and a multi-messenger approach).
  • Publications, and contributions to conferences.
  • Contributions to the communication and outreach activities.
  • Organization of regular video conferences
  • Organization of workshops for specific topics involving also WG1-2


Andrea AddaziINFN Roma 2Italy
Andrea MainoUniversità Statale di MilanoItaly
Antonino MarcianòINFN Frascati LNFItaly
Armando di MatteoINFN TurinItaly
Bo-Qiang MaPeking UniversityChina
Caterina TrimarelliUniversity of L’AquilaItaly
Danilo ZavrtanikUniversity of Nova GoricaSlovenia
Denise BoncioliUniversity of L’AquilaItaly
Deniz Sunar CerciAdiyaman UniversityTurkey
Dusan MandatInstitute of Physics of the Czech Academy of SciencesCzech Republic
Enrique ZasInstituto Galego de Física de Altas Enerxías (IGFAE)Spain
Fabian SchüsslerIRFU / CEA Paris-SaclayFrance
Federico UrbanCEICO, Institute of Physics (FZU), PragueCzech Republic
Foteini OikonomouSouthern Observatory (Munich)Germany
Francesco SalamidaUniversity of L’Aquila and INFN LNGSItaly
Francisco Pedreira GiraldaInstituto Galego de Física de Altas Enerxías (IGFAE)Spain
Germano NardiniUniversity of StavangerNorway
Giovanni Amelino-CameliaUniversity of NaplesItaly
Günter SiglUniversität HamburgGermany
Humberto Martinez-HuertaUniversidad Autónoma de Chiapas (UNACH)Mexico
Jaime Alvarez MuñizInstituto Galego de Física de Altas Enerxías (IGFAE)Spain
José Ignacio IllanaUniversity of GranadaSpain
José Javier RelancioUniversidad de ZaragozaSpain
José Luis CortésUniversidad de ZaragozaSpain
José Manuel CarmonaUniversidad de ZaragozaSpain
Julien BolmontMontpellier UniversityFrance
Karl-Heinz KampertBergische Universität WuppertalGermany
Lino MiramontiMilano University and INFNItaly
Lorenzo CaccianigaIstituto Nazionale di Fisica Nucleare – Sezione di MilanoItaly
Lukas ZehrerUniversity of Nova GoricaSlovenia
Malcolm FairbairnKing’s College LondonUK
Marco TorriUniversity of MilanItaly
Marcus NiechciolUniversität SiegenGermany
María Dolores Rodríguez FríasUniversidad de Alcalá de HenaresSpain
Markus RisseUniversity of SiegenGermany
Maykoll ReyesUniversidad de ZaragozaSpain
Nikolaos E MavromatosKing’s College LondonUK
Oleg KalashevInstitute for Nuclear Research RAS, MoscowRussia
Petr TinyakovUniversite Libre de BruxellesBelgium
Rafael Alves BatistaRadboud UniversityNetherlands
Roberto AloisioGran Sasso Science InstituteItaly
Rodrigo Gracia RuizIPHC lab, StrasbourgFrance
Salim CerciAdiyaman UniversityTurkey
Sorin Ion ZguraISS (Institute of Space Science)Romania
Stefan FunkFriedrich-Alexander-University Erlangen-NuernbergGermany
Vlad PopaISS (Institute of Space Science)Romania

Talks at CA18108 meetings

October 2019 Barcelona workshop

(please contact the working group leader if you want yours listed)