scholarly journals The Absorption of the Hard Component of Cosmic Rays in Water

1953 ◽  
Vol 6 (1) ◽  
pp. 60 ◽  
Author(s):  
AJ Dyer
Keyword(s):  
Cosmic Rays ◽  
Energy Loss ◽  
Recent Result ◽  
Satisfactory Agreement ◽  
Statistical Accuracy ◽  
Hard Component ◽  
Absolute Value ◽  
Loss Data ◽  
Momentum Spectra ◽  
Integral Range

The differential and integral range spectra of the hard component of cosmic rays in water have been measured down to a depth of 18�3 m. of water, and the integral results confirm the work of Ehmert (1937) and Wilson (1938) in this region. A lack of statistical accuracy in the differential measurements prevents the possible observation of an anomaly corresponding to 2�5 BeV./c. momentum. A comparison of the range and momentum spectra on the basis of the energy loss data of Halpern and Hall shows satisfactory agreement. The absolute value of the differential intensity is found to be 20 per cent. higher than that given by Rossi (1948) but agrees with the more recent result of York (1952).

scholarly journals Sea-level Momentum Spectra of Muons

1962 ◽  
Vol 15 (3) ◽  
pp. 420 ◽  
Author(s):  
DW Coates ◽  
WF Nash
Keyword(s):  
Sea Level ◽  
Satisfactory Agreement ◽  
Momentum Spectrum ◽  
Statistical Accuracy ◽  
Single Level ◽  
Momentum Spectra ◽  
Muon Momentum

The sea-level muon momentum spectrum in t,he range 0'7-30 GeV/c has been measured at Nottingham, England, at zenith angles of 0�,30� W., and 45 oW., based on 1052, 1010, and 1033 particles respectively. Agreement is found at 0� with the results of Owen and Wilson (1955) and disagreement with those of Caro, Parry, and Rathgeber (1951). The same form of disagreement occurs with the results of Moroney and Parry (1954) at 30� obtained using the same instrument as Caro, Parry, and Rathgeber. Within the statistical accuracy of the experi~ent satisfactory agreement is found with the theories based on either single level or extended production of the muons.

scholarly journals The Integral and Differential Range Spectra of Sea-Level Mesons

1954 ◽  
Vol 7 (1) ◽  
pp. 49
Author(s):  
AJ Dyer
Keyword(s):  
Cosmic Rays ◽  
Sea Level ◽  
Momentum Spectrum ◽  
Hard Component ◽  
Integral Range

The differential and integral range spectra of the hard component of cosmic rays in water and lead have been determined up to a thickness of 1500 g cm?2 of water, and 2800 g cm?2 of lead. The differential results indicate that there is no anomaly with an intensity greater than 5 per cent. in the differential momentum spectrum in the region below 4 BeV/c.

Analysis of Energy-Loss Data for 0.2-0.5 MeV/amup,α, andNin Se

1971 ◽  
Vol 3 (9) ◽  
pp. 2847-2851 ◽  
Author(s):  
Hiroshi Nakata
Keyword(s):  
Energy Loss ◽  
Loss Data

scholarly journals CHASING THE GZK WITH HiRes

2003 ◽  
Vol 18 (18) ◽  
pp. 1235-1245 ◽  
Author(s):  
DOUGLAS R. BERGMAN
Keyword(s):  
Energy Spectrum ◽  
Cosmic Rays ◽  
Energy Loss ◽  
High Energy ◽  
Cosmological Evolution ◽  
Similar Distribution ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays ◽  
Luminous Matter ◽  
The Universe

The HiRes collaboration has recently announced preliminary measurements of the energy spectrum of ultra-high energy cosmic rays (UHECR), as seen in monocular analyses from each of the two HiRes sites. This spectrum is consistent with the existence of the GZK cutoff, as well other aspects of the energy loss processes that cause the GZK cutoff. Based on the analytic energy loss formalism of Berezinsky et al., the HiRes spectra favor a distribution of extragalactic sources that has a similar distribution to that of luminous matter in the universe, both in its local over-density and in its cosmological evolution.

scholarly journals STUDYING THE ENERGY LOSS OF HEAVY QUARKS VIA SINGLE MUON PRODUCTION IN PbPb COLLISIONS AT $\sqrt{^SNN} = 5.5 {\rm TeV}$

2007 ◽  
Vol 16 (07n08) ◽  
pp. 2041-2047 ◽  
Author(s):  
HENG-TONG DING ◽  
ANDREA DAINESE ◽  
ZAIDA CONESA DEL VALLE ◽  
DAICUI ZHOU
Keyword(s):  
Transverse Momentum ◽  
Energy Loss ◽  
Heavy Quarks ◽  
Medium Density ◽  
Momentum Spectra ◽  
Single Muon ◽  
Transverse Momentum Spectra ◽  
Muon Production

The effects of heavy quarks energy loss on the transverse momentum spectra of single muons are studied. The energy loss of heavy quarks when traversing the medium formed in PbPb collisions at [Formula: see text] is calculated by implementing the collision geometry and the quenching weights. The medium density is assumed to decrease at forward pseudo-rapidity and to be proportional with pseudo-rapidity multiplicity dN/dη. Muons from W decays can be used as a medium-blind reference to quantify the effect of heavy quarks energy loss on the single muon production.

The Variation of the Hard Component of Cosmic Rays with Height and the Disintegration of Mesotrons

1940 ◽  
Vol 57 (6) ◽  
pp. 461-469 ◽  
Author(s):  
Bruno Rossi ◽  
Norman Hilberry ◽  
J. Barton Hoag
Keyword(s):  
Cosmic Rays ◽  
Hard Component
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