Last edited by Vudoktilar
Tuesday, July 21, 2020 | History

4 edition of Ultrahigh-energy particle flux from cosmic strings found in the catalog.

Ultrahigh-energy particle flux from cosmic strings

Ultrahigh-energy particle flux from cosmic strings

  • 207 Want to read
  • 1 Currently reading

Published by Fermi National Accelerator Laboratory in Batavia, IL .
Written in English


Edition Notes

StatementPijushpani Bhattacharjee and N. C. Rana.
Series[NASA contractor report] -- NASA-CR-186592., NASA contractor report -- NASA CR-186592.
ContributionsRana, N. C., United States. National Aeronautics and Space Administration., Fermi National Accelerator Laboratory.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17632965M
OCLC/WorldCa65222137

A first project with the Westerbork Synthesis Radio Telescope has placed the most stringent upper limits on the flux of ultra high energy cosmic rays and neutrinos. The next step is to observe with LOFAR, currently one of the most sensitive low frequency telescopes. Ultrahigh Energy Cosmic Rays • Cosmic Rays @ E > ~ eV are referred to as “Ultra-High Energy Cosmic. Rays” (UHECR) or extremely high energy cosmic rays (EHECR) It is customary to plot the UHECR flux multiplied by E. 3. in order to reveal the subtler structures in the spectrum.

from cosmic string loops. For the 'standard'value of the dimensionless cosmic string param-eter e = G_ _ 10 -6, the flux is several orders of magnitude below the observed cosmic-ray flux of ultra-high energy protons. However, the flux at any ener_" initially increases as the value of e is decreased. ULTRAHIGH ENERGY COSMIC RAYS: THE STATE OF THE ART BEFORE THE AUGER OBSERVATORY. LUIS ANCHORDOQUI, THOMAS PAUL, The Neutron Flux Variation in the Earth’s Atmosphere Depending on the Solar Proton Flux. Marina Poje, Branko Vuković, Maja Varga Pajtler, Vanja Radolić and Igor Miklavčić et al. Progress in Particle and Nuclear Physics.

  The recent detection of ultra-high energy cosmic rays (UHE CRs) with energies above EeV (1–5) has triggered considerable discussion in the literature on the nature and origin of these particles (6–8).On the one hand, even the most powerful astrophysical objects such as radio galaxies and active galactic nuclei are barely able to accelerate charged particles to such energies (). helium photodisintegration and nucleosynthesis: implications for topological defects, high energy cosmic rays, and massive black holes item preview.


Share this book
You might also like
Mind-body therapy

Mind-body therapy

practical manual of chemical engineering.

practical manual of chemical engineering.

Nagananda of Shreeharsha =

Nagananda of Shreeharsha =

My family tree and other limbs & twigs

My family tree and other limbs & twigs

Fat and blood

Fat and blood

Women in the soviet East

Women in the soviet East

The awful possibilities

The awful possibilities

Experimental methodologies for the determination of disinfection effectiveness

Experimental methodologies for the determination of disinfection effectiveness

Investment in Thailand

Investment in Thailand

1997 UBC/2006 IBC nonstructural comparison & cross reference

1997 UBC/2006 IBC nonstructural comparison & cross reference

A description of Buxton, and the adjacent country; or the new guide, for ladies and gentlemen, resorting to that place of health and amusement; ...

A description of Buxton, and the adjacent country; or the new guide, for ladies and gentlemen, resorting to that place of health and amusement; ...

Maltese Goddess

Maltese Goddess

Bibliography of naturally occurring animal models of human disease

Bibliography of naturally occurring animal models of human disease

Jewish American literature since 1945

Jewish American literature since 1945

Ultrahigh-energy particle flux from cosmic strings Download PDF EPUB FB2

Volumenumber 3,4 PHYSICS LETTERS B 30 August Ultrahigh-energy particle flux from cosmic strings Pijushpani Bhattacharjee Astronomy & Astrophysics Center, Enrico Fermi Institute, University of Chicago, S.

Ellis Avenue, Chicago, ILUSA and NASAIFermilab Astrophysics Center, Fermi National Accelerator Laboratory, P. BoxBatavia, ILUSA Cited by: Get this from a library. Ultrahigh-energy particle flux from cosmic strings. [Pijushpani Bhattacharjee; N C Rana; United States. National Aeronautics and.

The flux of ultrahigh energy protons from cusps may account for a large fraction of the observed events at the highest energies.

We study massive particle radiation from cosmic string kinks. We calculate the flux of ultrahigh-energy protons due to the process of ``cusp evaporation'' from cosmic-string loops. For the ``standard'' value of the dimensionless cosmic-string parameter ∊==Gμ~=10 -6, the flux is several orders of magnitude below the observed cosmic-ray flux of ultrahigh-energy protons.

However, the flux at any energy initially increases as the value of ∊ is Cited by: The reason that the flux from cosmic strings is so small is that space is so big and there are so few relevant events in it.

8 4 Conclusions The flux of ultra-high-energy cosmic rays from gauge cosmic strings is smaller than the observed fluxes by about ten orders of magnitude, too small to be detectable with current technology. We calculate the flux of ultrahigh energy neutrinos from ordinary (i.e.

non-superconducting) cosmic strings and compare the results with the most recent observational constraints. For heavy strings (where the mass per unit length is determined by the scale of grand unification) the predicted flux is below the present observational limits.

These results (which remain to be confirmed by independent simulations) seem to show that massive particle production may be a generic feature of cosmic strings, which would make cosmic strings an inevitable source of extremely high energy cosmic rays with potentially detectable flux.

At the same time, cosmic strings are severely constrained by. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): We consider the production of 3 He and 2 H by 4 He photodisintegration initiated by nonthermal energy releases during early cosmic epochs.

We find that this process cannot be the predominant source of primordial 2 H since it would result in anomalously high 3 He/D ratios in conflict with standard chemical evolution. At the same time, cosmic strings are severely constrained by the observed cosmic ray flux above 10 20 eV, if massive particle radiation is the dominant energy loss mechanism for cosmic strings.

The topological defect scenario of origin of the observed highest energy cosmic rays is reviewed. Anne Zilles's 52 research works with 1, citations and 2, reads, including: Diagnosing pulsar winds in black-widow, redback, and other binary millisecond pulsar systems.

Detecting UHE cosmic Rays • Questions to answer: – Flux, Composition, and Anisotropy at high energies • Main Problem: Flux follows a power law – F(E /m2/yr ⇒ high enough for direct detection of primary particle (calorimeter) – F(E>eV).

At the same time, cosmic strings are severely constrained by the observed cosmic ray flux above $10^{20}$ eV, if massive particle radiation is the dominant energy loss mechanism for cosmic t: Latex, 27 pages, including 1 ps fig.

Invited talk given at the Workshop on ``Observing the Highest Energy Particles ($ > 10^{20}$ eV) from. Topological defects, particularly cosmic strings, can provide a mechanism to produce particles with energies of the order 10 21 eV and higher. Here, we report on order of magnitude calculations of fluxes from a cosmic string network which evolves according to a new scenario according to which the main channel for energy loss is the particle production rather than gravitational radiation.

Cosmic rays are high-energy protons and atomic nuclei which move through space at nearly the speed of originate from the sun, from outside of the solar system, and from distant galaxies. Upon impact with the Earth's atmosphere, cosmic rays can produce showers of secondary particles that sometimes reach the from the Fermi Space Telescope () have been interpreted as.

The result of a series of lectures prepared for graduate students and postdoctoral researchers, this book is a general introduction to experimental techniques and results in the field of ultrahigh energy cosmic rays.

It succinctly summarizes the rapidly developing field, and provides modern results that include data from newer detectors. Cosmic strings form lines of trapped energy density.

If the energy scale of the phase transition which leads to cosmic string formation is, then the string tension (which equals the mass per unit length) is ’ 2: (1) The dynamics of cosmic string networks can be described by the dimensionless number G, where Gis Newton’s gravitational.

Cosmic ray (CR) and accelerator based particle physics share common roots, and in fact many of the key discoveries early in the history of particle physics came from the study of CRs.

After a period of divergence between the two fields, both in methodology and in the key areas of interest, a confluence is now underway, driven in no small part.

Cosmic strings are linear concentrations of energy that form whenever phase transitions in the early universe break axial symmetries, as originallyshown by Kibble [].They are the result of frustrated order in the quantum fields responsible forelementary particles and their interactions.

The origin of cosmic rays is one of the major unresolved questions in astrophysics. In particular, the highest energy cosmic rays observed have macroscopic energies up to several electron volts and thus provide a probe of physics and astrophysics at energies unattained in laboratory experiments.

Theoretical explanations range from astrophysical acceleration of charged particles, to. Interaction of a vorton with a proton in Earth's atmosphere varies with energy in a way that depends on the interaction of quarks inside the proton with current-carrying particle states in the string loop.

Ultra-high-energy cosmic rays created in this way might have a characteristic energy spectrum that would identify vorton collisions as their. Abstract.

Many astrophysical objects in the Universe are expected to produce cosmic neutrinos with very high energies (1 TeV ≲ E ν ≲ 1 PeV), ultrahigh energies (E ν ≳ 1 PeV) or extremely high energies (E ν ≳ EeV) energetic neutrinos may serve as a unique cosmic messenger and provide us with useful information about the cosmos that cannot be extracted from the measurements.If an ultrahigh-energy cosmic ray could penetrate Earth’s atmosphere and hit someone in the head, that single subatomic particle would feel like a fast-pitch baseball to the [email protected]{osti_, title = {On the motion of a quantum particle in the spinning cosmic string space–time}, author = {Hassanabadi, H., E-mail: [email protected] and Afshardoost, A.

and Zarrinkamar, S.}, abstractNote = {We analyze the energy spectrum and the wave function of a particle subjected to magnetic field in the spinning cosmic string space–time and investigate the.