Camouflage & markings : Martin B-26 Marauder U.S.A.A.F. & by Roger A.} {Freeman

By Roger A.} {Freeman

WWII aircraft identity.

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Extra info for Camouflage & markings : Martin B-26 Marauder U.S.A.A.F. & 1st T.A.F., 1941-1945

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This detector was used for charged-kaon identification and e/π separation. 0 cm. 4 cm thick) of plastic scintillators with an 8 cm thick liquid threshold Cerenkov detector in between. The kaon identification efficiency was about 75% for kaon momenta greater than 350 MeV/c. The probability of faking a kaon signal was smaller than 6×10−3. Using the dE/dx information from the first scintillator, a good K/π separation was possible up to 500 MeV/c. The two charged tracks from the decays K0 → π + π − , π + e− ν, π + µ− ν were reconstructed and the decay vertex was calculated.

4) of the lead glass counter array must exceed 450 MeV. The tracks of the e+ e− pair from a γ converted in the first four modules are used to determine the decay point, and this position is used together with the conversion points of the other γ rays to determine their directions. Gamma rays are then paired such that the invariant mass of the pair is as close as possible to the π 0 mass. The π 0 mass, the 4γ invariant mass m, the angle θ between the total visible momentum and the beam path, and pγ , the largest of the transverse momenta of the γ rays, can be used as constraints in the kinematical selection of 2π 0 decays.

If there is a nontrivial phase δ in the unitary mixing matrix, then the product is a complex number, with the imaginary part depending on the phase δ. This leads to time-reversal (T ) violation and to CP violation. The CP-violating mixing parameter for the kaon system, ε, is given by ε= 2 mK m2W G2F fK √ BK m(Vtd Vts∗ )F (m2t , m2c ) . 4) where S0 (m2t ) is a kinematical factor. For the B0d –B0d mixing, a similar box graph applies, with the s quark ∗ replaced by a b quark. Here the amplitude is proportional to G2F Vtb Vtb∗ Vtd Vtd .

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