Download e-book for iPad: Uncovering CP Violation: Experimental Clarification in the by Konrad Kleinknecht

By Konrad Kleinknecht

ISBN-10: 3540403337

ISBN-13: 9783540403333

ISBN-10: 3540449167

ISBN-13: 9783540449164

Uncovering CP Violation offers with some of the components essential to create the saw matter-antimatter asymmetry of the universe. there's one strength in nature which acts another way on subject and antimatter. This phenomenon used to be came upon in decays of impartial okay mesons in 1964. In a protracted sequence of ever sophisticated experiments among 1964 and 2001, it was once proven that this strength emerges as part of the vulnerable interplay among quarks ("direct CP violation"). it really is because of style blending of 3 quark households. This photo was once proven by way of experiments on impartial B mesons, which additionally proven CP violation in 2001. The e-book describes the experiments that exposed the character of CP violation and the phenomenology describing CP violation.

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Download e-book for iPad: Uncovering CP Violation: Experimental Clarification in the by Konrad Kleinknecht

Uncovering CP Violation bargains with one of the elements essential to create the saw matter-antimatter asymmetry of the universe. there's one strength in nature which acts otherwise on topic and antimatter. This phenomenon was once found in decays of impartial okay mesons in 1964. In an extended sequence of ever sophisticated experiments among 1964 and 2001, it used to be proven that this strength emerges as part of the susceptible interplay among quarks ("direct CP violation").

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6 was the successor to the NA31 experiment and also built at CERN. The experiment was exposed to a simultaneous nearly collinear KL /KS beam, derived from a 450 GeV/c proton beam from the SPS. The KS beam was produced by using a fraction of the protons that did not interact with the KL target. In the NA48 experiment [68], the charged and neutral decay modes of KL and KS mesons could be measured simultaneously. Charged particles from decays were measured by a magnetic spectrometer composed of four drift 48 5 The Neutral K Meson System chambers with a dipole magnet (inducing a transverse momentum kick of 265 MeV/c in the horizontal plane) between the second and the third chamber.

8 CPLEAR In contrast to the four detectors described in the previous sections, the CPLEAR detector measured decays from kaons produced in p¯p annihilations at rest obtained from the low energy p¯ ring LEAR at CERN. The antiprotons were stopped in a 16 bar hydrogen gas target and formed a protonium before annihilation. In annihilation reactions of the type p¯p → K0 K− π + and p¯p → K0 K+ π − , the charged kaon was identified through the time of flight and track curvature in a solenoidal magnetic field (“tagging”).

The nuclear regeneration phase can be calculated from a dispersion integral over the amplitude f (0) − f (0) as a function of the kaon momentum pK . If it is assumed that this difference is determined by a single ω meson exchange process (Regge behavior), then the decrease of f (0) − f (0) follows a power law (pK )α . In this simplified case, the phase Φf is related to the exponent α by the relation Φf = −(π/2)(1 + α). However, this is only true if the decrease of the amplitude f (0)− f(0) follows this power law exactly up to infinite momentum.

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Uncovering CP Violation: Experimental Clarification in the Neutral K Meson and B Meson Systems by Konrad Kleinknecht


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