International Symposium on Future Directions in UHECR Physics

Session

Theory and measurement of UHECR flux and composition

Feb 14, 2012, 2:00 PM

500/1-001 - Main Auditorium (CERN)

Conveners

Theory and measurement of UHECR flux and composition

• James Matthews (Louisiana State University)

Theory and measurement of UHECR flux and composition

• Peter Grieder (University of Bern)

Description

Contributed talks 6 x 15+5 min

4. Particle physics connection

Jonathan R. Ellis (CERN)

2/14/12, 2:00 PM

9. Review of accelerator data of relevance to shower simulation

Prof. Yoshitaka Itow (Nagoya University)

2/14/12, 2:40 PM

23. Recent results from LHCf

Gaku Mitsuka (Nagoya University (JP))

2/14/12, 3:20 PM

talk

The Large Hadron Collider forward experiment measured very forward neutral particle spectra in LHC proton-proton collisions in early 2010. In this talk we will discuss the energy and transverse momentum spectra of neutral pion at the 7TeV proton-proton collision, and also present the inclusive photon energy spectra taken at the 900GeV collisions. The spectra in both collision energy are...

99. Estimates of the proton-proton cross section at UHE energy

Prof. Paolo Lipari (Universita di Roma I)

2/14/12, 3:40 PM

talk

This contribution discusses possible methods to measure the proton-proton total cross section from observations of Ultra High Energy cosmic rays, and the theoretical uncertainties associated with these methods.

84. Measurement of the proton-air cross section with the Pierre Auger Observatory

Dr Ralf Matthias Ulrich (KIT - Karlsruhe Institute of Technology (DE))

2/14/12, 4:30 PM

talk

Authorship: The Pierre Auger Collaboration. Using the tail of the distribution of the depth of shower maxima observed with the Pierre Auger Observatory, we derive an estimate of the proton-air cross section for particle production at center-of-mass energies of 57 TeV. Air showers observed with the fluorescence detector and at least one station of the surface array are analyzed in the...

88. Measurements of the muon shower content at the Pierre Auger Observatory

Alexey Yushkov

2/14/12, 4:50 PM

talk

Various methods of estimation of the muonic part of the signal observed in the surface Cherenkov detectors have been developed within the Pierre Auger Collaboration in the recent years. Muon shower content, derived from data with these methods, is larger in comparison with predictions of QGJSET II and EPOS 1.99 interaction models. The zenith angle dependence of the muon deficit in simulations...

103. New Physics at UHE energies

Prof. Glennys Farrar (New York University)

2/14/12, 5:10 PM

talk

Ultrahigh energy cosmic rays (UHECRs) are the highest energy particles in the Universe, recorded to have energies up to 100 million times greater than the LHC beams. Whether they are protons or nuclei and how they are accelerated are presently unknown. The particle cascades created when these UHECRs interact in the atmosphere are not well-described by simulations, but since the primary...

29. New technique and results of cosmic ray investigations in the energy interval 10^15 – 10^19 eV

Prof. Anatoly Petrukhin (MEPhI)

2/14/12, 5:30 PM

talk

New technique of EAS investigations by means of the method of local muon density spectra (LMDS) is developed. Application of this method to investigations of inclined EAS allows exploration of CR energy interval from 10^15 to 10^19 eV by means of a relatively small detector with area ~100 m^2 due to very strong dependence of EAS muon density on zenith angle. During 2002-2007, long-term...

10. WG Review of modeling and description of air showers

Dr Ralph Engel (Forschungszentrum Karlsruhe)

2/14/12, 5:50 PM