Precision measurement of the pion mass differencemπ−−mπ0

The most precise value for the pion mass was determined from a precision measurement at PSI of the muon momentum in pion decay at rest, \pi^+ \rightarrow \mu^+ + \nu_{\mu}π+→μ++νμ. The result is m_{\pi^+} = 139.570\,21(14)mπ+=139.57021(14)~MeV/c^22. This value is more precise, however, in agreement with the recent compilation of the Particle Data Group for m_{\pi^-}mπ−. The agreement of m_{\pi^+}mπ+ with the recent measurement. This yields a new quantitative measure of CPT invariance in the pion sector: (m_{\pi^+} - m_{\pi^-})/m_{\pi}(\mbox{av}) = (-2.9 \pm 2.0)\cdot 10^{-6}(mπ+−mπ−)/mπ(av)=(−2.9±2.0)⋅10−6, an improvement by two orders of magnitude.

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High precision measurement of the SOS surface thickness in the rough phase

Journal de Physique I ◽

10.1051/jp1:1991234 ◽

1991 ◽

Vol 1 (12) ◽

pp. 1669-1673 ◽

Cited By ~ 7

Author(s):

Hans Gerd Evertz ◽

Martin Hasenbusch ◽

Mihail Marcu ◽

Klaus Pinn ◽

Sorin Solomon

Keyword(s):

High Precision ◽

Precision Measurement ◽

High Precision Measurement ◽

Surface Thickness

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HIGH PRECISION MEASUREMENT OF THE LIFETIME OF THE 3P2 AND 4P5/2-STATES IN Ar16+ AND Ar15+

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1979145 ◽

1979 ◽

Vol 40 (C1) ◽

pp. C1-218-C1-220 ◽

Cited By ~ 1

Author(s):

H. D. Dohmann ◽

R. Mann

Keyword(s):

High Precision ◽

Precision Measurement ◽

High Precision Measurement

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Precision Measurement of Audio Frequency Voltage Based on the Least Squares Method and Application of the Method for Voltage Ratio Measurement

IEEJ Transactions on Fundamentals and Materials ◽

10.1541/ieejfms1990.116.5_430 ◽

1996 ◽

Vol 116 (5) ◽

pp. 430-438 ◽

Cited By ~ 1

Author(s):

Toshihiko Yoshioka ◽

Megumi Sato ◽

Touru Yamazaki

Keyword(s):

Least Squares ◽

Precision Measurement ◽

Least Squares Method ◽

Audio Frequency ◽

Ratio Measurement ◽

Voltage Ratio

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INDALLOY 160-190

Alloy Digest ◽

10.31399/asm.ad.bi0034 ◽

1984 ◽

Vol 33 (1) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Precision Measurement ◽

Heat Treating ◽

Spray Forming ◽

Growth Behavior ◽

Temperature Range

Abstract INDALLOY 160-190 is a bismth-base low-melting alloy that melts through th temperature range 160-190 F. It shrinks immediately upon solidification, grows back to zero in about one hour and then shows additional growth. This shrinkage-growth behavior makes it an ideal alloy for proof casting and precision measurement of internal dimensions. This alloy originally was developed for use by children for casting soldiers and other small objects. It performs best among the low-melting alloys for spraying in the spray forming of masks and molds and in metallizing. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on casting, heat treating, machining, and joining. Filing Code: Bi-34. Producer or source: Indium Corporation of America.

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