Volume 43, Issue 21

19 November 1979

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LETTERS

Elementary Particles and Fields

Production of High-Mass Muon Pairis in $π^{-}$ Be Collisions at 150 and 175 GeV/c

R. Barate et al.

Phys. Rev. Lett. 43, 1541 (1979) - Published 19 November, 1979

Measurement of $ω$ -Meson Photoproduction on Protons from 46 to 180 GeV

R. M. Egloff, P. J. Davis, G. J. Luste, J. F. Martin, J. D. Prentice, D. O. Caldwell, J. P. Cumalat, A. M. Eisner, A. Lu, R. J. Morrison, S. J. Yellin, and T. Nash

Phys. Rev. Lett. 43, 1545 (1979) - Published 19 November, 1979

Calculability in $SU {(2)}_{L} \otimes SU {(2)}_{R} \otimes U (1)$ : The Mass Matrix and $CP$ -Invariance Violation

Arthur C. Rothman and Kyungsik Kang

Phys. Rev. Lett. 43, 1548 (1979) - Published 19 November, 1979

Multimuon Final States in Muon-Nucleon Scattering at 270 GeV

D. Bauer, J. Kiley, R. Ball, C. Chang, K. W. Chen, M. Ghods, S. Hansen, A. Kotlewski, L. Litt, P. F. Schewe, and A. Van Ginneken

Phys. Rev. Lett. 43, 1551 (1979) - Published 19 November, 1979

Measurement of the Branching Fraction for $τ \to ρ ν$

G. S. Abrams et al.

Phys. Rev. Lett. 43, 1555 (1979) - Published 19 November, 1979

Charge-Symmetry Breaking in the Nucleon-Nucleon Interaction

Paul Langacker and D. A. Sparrow

Phys. Rev. Lett. 43, 1559 (1979) - Published 19 November, 1979

Effects of Heavy Particles through Factorization and Renormalization Group

Yoichi Kazama and York-Peng Yao

Phys. Rev. Lett. 43, 1562 (1979) - Published 19 November, 1979

Baryon- and Lepton-Nonconserving Processes

Steven Weinberg

Phys. Rev. Lett. 43, 1566 (1979) - Published 19 November, 1979

Operator Analysis of Nucleon Decay

Frank Wilczek and A. Zee

Phys. Rev. Lett. 43, 1571 (1979) - Published 19 November, 1979

Nuclei

Angular Distributions for the Reaction ${}^{18}O$ ( $π^{+}$ , $π^{-}$ ) ${}^{18}{Ne}$ and Pion Double-Charge-Exchange Form Factors

Kamal K. Seth, S. Iversen, H. Nann, M. Kaletka, J. Hird, and H. A. Thiessen

Phys. Rev. Lett. 43, 1574 (1979) - Published 19 November, 1979

$π$ - ${}^{13}C$ Scattering near the $π N (3, 3)$ Resonance

E. Schwarz, J. -P. Egger, F. Goetz, P. Gretillat, C. Lunke, C. Perrin, B. M. Preedom, and R. E. Mischke

Phys. Rev. Lett. 43, 1578 (1979) - Published 19 November, 1979

Coulomb Distortion of Pion Spectra from Heavy-Ion Collisions

K. G. Libbrecht and S. E. Koonin

Phys. Rev. Lett. 43, 1581 (1979) - Published 19 November, 1979

Atoms and Molecules

$H (2 s)$ Formation and the Lyman- $α$ Polarization in 1-7-keV $H^{+}$ -H Collisions

D. S. F. Crothers and John Gerard Hughes

Phys. Rev. Lett. 43, 1584 (1979) - Published 19 November, 1979

Two-Photon Coherent-Transient Measurement of the Nonradiative Collisionless Dephasing Rate in S $F_{6}$ via Doppler-Free Degenerate Four-Wave Mixing

D. G. Steel and J. F. Lam

Phys. Rev. Lett. 43, 1588 (1979) - Published 19 November, 1979

Fluids, Plasmas, and Electric Discharges

Saturation of Brillouin Backscatter

Mark J. Herbst, Christopher E. Clayton, and Francis F. Chen

Phys. Rev. Lett. 43, 1591 (1979) - Published 19 November, 1979

Condensed Matter: Structure, Etc.

Instantaneous Flux-Change Measurement of the Mobile Dislocation Density in Crystals

C. S. Pang and J. M. Galligan

Phys. Rev. Lett. 43, 1595 (1979) - Published 19 November, 1979

Molecular Dynamics of Shock Waves in Three-Dimensional Solids: Transition from Nonsteady to Steady Waves in Perfect Crystals and Implications for the Rankine-Hugoniot Conditions

Brad Lee Holian and Galen K. Straub

Phys. Rev. Lett. 43, 1598 (1979) - Published 19 November, 1979

Instability of Persistent Currents and Heat Flow in Superfluid ${}^{3}{He}$ - $A$

Alexander L. Fetter and Mark R. Williams

Phys. Rev. Lett. 43, 1601 (1979) - Published 19 November, 1979

Nematic-Isotropic Transition in Liquid Crystals

Lin Lei

Phys. Rev. Lett. 43, 1604 (1979) - Published 19 November, 1979

Special Phonons and Superconductivity in the Hexagonal Tungsten Bronzes

W. A. Kamitakahara, K. Scharnberg, and H. R. Shanks

Phys. Rev. Lett. 43, 1607 (1979) - Published 19 November, 1979

Condensed Matter: Electronic Properties, Etc.

New Evidence for the Two-Electron $O^{-}$ State in GaP

M. Gal, B. C. Cavenett, and P. Smith

Phys. Rev. Lett. 43, 1611 (1979) - Published 19 November, 1979

Evidence Against Spin-Glass Order in the Two-Dimensional Random-Bond Ising Model

I. Morgenstern and K. Binder

Phys. Rev. Lett. 43, 1615 (1979) - Published 19 November, 1979

Frustration Effect in Quantum Spin Systems

L. G. Marland and D. D. Betts

Phys. Rev. Lett. 43, 1618 (1979) - Published 19 November, 1979

Geophysics, Astronomy, and Astrophysics

Development of Atmospheric Cosmic-Ray Showers

Greg Thornton and Roger Clay

Phys. Rev. Lett. 43, 1622 (1979) - Published 19 November, 1979

ERRATA

Influence of Extra Neutrons Added to the ${}^{12}C$ + ${}^{16}O$ System: Gross Structures in $γ$ -Ray Yields Following the ${}^{13}C$ + ${}^{16}O$ and ${}^{12}C$ + ${}^{18}O$ Reactions

Y. -d. Chan, H. Bohn, R. Vandenbosch, R. Sielemann, J. G. Cramer, K. G. Bernhardt, H. C. Bhang, and D. T. C. Chiang

Phys. Rev. Lett. 43, 1625 (1979) - Published 19 November, 1979