Final Results from the High solution Flyʼs Eye (HiRes) Experiment

Sokolsky, P.

doi:10.1016/j.nuclphysbps.2011.03.010

Cited by 41 publications

(24 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(This is compatible with the 22% margins allowed by PAO for systematic errors.) Such upscaling in energies, from the one side, renders the PAO data compatible with the data accumulated by other experiments HiRes [48] and TA [49], in the energy range E < 20 EeV where all experiments reached very good accuracy, and on the other side, with the spectral characteristics predicted by dip model that considers protons as the cosmic ray carriers [40]. One can immediately observe that the standard UHECR spectrum (the red solid curve our GZK on Fig.…”

supporting

confidence: 82%

See 1 more Smart Citation

Neutron oscillations to parallel world: earlier end to the cosmic ray spectrum?

Berezhiani

Gazizov

2012

Eur. Phys. J. C

View full text Add to dashboard Cite

Present experimental data do not exclude fast oscillation of the neutron n to its degenerate twin from a hypothetical parallel sector, the so called mirror neutron n . We show that this effect brings about remarkable modifications of the ultrahigh-energy cosmic ray spectrum testable by the present Pierre Auger Observatory (PAO) and Telescope Array (TA) detector, and the future JEM-EUSO experiment. In particular, the baryon non-conservation during UHECR propagation at large cosmological distances shifts the beginning of the GZK cutoff to lower energies, while in the presence of mirror sources it may enhance the spectrum at E > 100 EeV. As a consequence, one can expect a significant reduction of the diffuse cosmogenic neutrino flux.There may exist a hidden parallel sector that is an exact copy of our particle sector. One can imagine a theory based on a direct product G × G of identical gauge factors with identical particle contents which can emerge, e.g. in the context of E 8 × E 8 string theory. As a minimal possibility, one can consider a case of two Standard Model copies with G = SU (3) × SU (2) × U(1) standing for ordinary sector and G = SU (3) × SU (2) × U(1) standing for parallel sector. Alternatively, one can envisage some grand unified extensions as SU (5) × SU (5) , etc. The Lagrangians of two worlds can be rendered identical to each other, with all coupling constants being exactly the same in both sectors, by introducing a discrete symmetry G ↔ G under the exchange of two gauge systems and of the respective matter fields.A well-known example, coined as mirror world [1-6], was introduced a long time ago for interpreting parity as a discrete symmetry when our 'left-handed' particles are exchanged with their mirror twins that are 'right-handed'. a e-mail: zurab.berezhiani@aquila.infn.it b e-mail: askhat.gazizov@desy.de Concerns about parity are irrelevant for our following discussions, which can be extended to a parallel sector (or sectors) of any chirality. For us is important only that each ordinary particle: electron e, proton p, neutron n etc. may have a mass degenerate twin: e , p , n etc. These twin particles must be sterile to our strong and electroweak interactions but have their own strong and electroweak interactions among themselves. 1 Mirror baryons can be viable as asymmetric dark matter provided that parallel sector has smaller temperature than the ordinary one, T T [7][8][9][10]. On the other hand, once this condition is fulfilled, B-L and CP violating interactions among ordinary and mirror particles can generate baryon asymmetries in both sectors [11,12], naturally giving the relation Ω B /Ω B 5 between cosmological fractions of the dark and visible matter [13][14][15]. Such interactions can be mediated by heavy messengers coupled to both sectors, as right handed neutrinos or extra gauge bosons/gauginos [16]. In the context of extra dimensions, ordinary and mirror sectors can be modeled as two parallel 3-dimensional branes and particle processes between them could be mediated by the...

show abstract

supporting

confidence: 82%

“…However, we consider that it would be premature to claim that the problem is solved until the experimental situation is not well settled. A controversy concerning the shape and chemical composition of the UHECR spectrum between the PAO data from one side, and the data of HiRes [48] and TA [49] on the other side, is not yet resolved (see e.g. [50]).…”

mentioning

confidence: 99%

Neutron oscillations to parallel world: earlier end to the cosmic ray spectrum?

Berezhiani

Gazizov

2012

Eur. Phys. J. C

View full text Add to dashboard Cite

show abstract

“…HiRes interpretation of the measured depth of shower maximum (X max ) and its fluctuations was that all UHECR are Hydrogen nuclei (protons) (Sokolsky, 2011), while Auger interpreted its results as a chemical composition becoming increasingly heavier with energy above 2×10 18 eV (Kampert&Unger, 2012). The interpretation of the chemical composition from the X max measurement depends on the hadronic interaction model used which creates a significant systematic error.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Energy Cosmic Rays: Review of the Current Situation

Stanev

2013

Acta Polytech

View full text Add to dashboard Cite

We describe the current situation of the data on the highest energy particles in the Universe -the ultrahigh energy cosmic rays. The new results in the field come from the Telescope Array experiment in Utah, U.S.A. For this reason we concentrate on the results from this experiments and compare them to the measurements of the other two recent experiments, the High Resolution Fly's Eye and the Southern Auger Observatory.Keywords: High energy cosmic rays -Hadronic interaction at very high energy -Origin of the highest energy cosmic rays.

show abstract

“…9). At the same time HiRes [17] and Auger [18] data on Xmax distribution favor a light (predominantly proton) primary composition near 10 18 eV. The last measurements of muon energy spectrum above 100 TeV [19] also showed serious deviations from usual energy spectrum (Fig.…”

Section: Epj Web Of Conferencesmentioning

confidence: 76%

Nucleus-nucleus interactions in very-high-energy cosmic ray experiments

Петрухин

Bogdanov

2017

EPJ Web Conf.

View full text Add to dashboard Cite

Abstract.A review of unusual results of experiments in cosmic rays which cannot be explained in the frame of the existing models of hadron interactions is presented. Requirements to features of a new model which are necessary for explanation of all observed unusual events and phenomena are formulated. A model of hadron interactions with production of QGM blobs with large orbital momentum is considered. Its possibilities for explanation of various unusual events and phenomena are discussed.

show abstract

Final Results from the High solution Flyʼs Eye (HiRes) Experiment

Cited by 41 publications

References 14 publications

Neutron oscillations to parallel world: earlier end to the cosmic ray spectrum?

Neutron oscillations to parallel world: earlier end to the cosmic ray spectrum?

Ultrahigh Energy Cosmic Rays: Review of the Current Situation

Nucleus-nucleus interactions in very-high-energy cosmic ray experiments

Contact Info

Product

Resources

About