Parity non-conservation in inelastic electron scattering

Prescott, C.Y.; Atwood, W. B.; Cottrell, R.L.A.; DeStaebler, H.; Garwin, E. L.; Gonidec, A.; Miller, R.H.; Rochester, L.S.; Sato, T.; Sherden, D. J.; Sinclair, C. K.; Stein, Stephen J.; Taylor, Richard E.; Clendenin, J. E.; Hughes, V. W.; Sasao, N.; Schüler, K. P.; Borghini, M.; Lübelsmeyer, K.; Jentschke, W.

doi:10.1016/0370-2693(78)90722-0

Cited by 638 publications

(114 citation statements)

References 11 publications

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“…The resulting expression for the asymmetry, known as the Cahn-Gilman (CG) formula [3], is given at tree level by 1 …”

Section: Overviewmentioning

confidence: 99%

“…In the 1970s parity-violating deep-inelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium played an important role in confirming the standard model (SM) of particle physics [1][2][3]. The asymmetry,…”

Section: Introductionmentioning

confidence: 99%

“…Here, g e V (g e A ) are the vector (axial vector) couplings of the Z boson to the electron; F γ 1 , F γ Z 1 , and F γ Z functions arising, respectively, from hadronic matrix elements of the vector electromagnetic (EM) current, interference of the vector EM and vector weak neutral current (WNC), and interference of the vector EM current and axial vector WNC; and Y 1,3 are functions of kinematic variables and the ratios R γ and R γ Z of longitudinal and transverse cross sections for purely EM and WNC-EM vector current interference cross sections. In the SM, at leading twist and in the absence of CSV effects, the Y 1 term in Eq.…”

Section: Introductionmentioning

confidence: 99%

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Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering

2010

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We show that parity-violating deep-inelastic scattering (PVDIS) of longitudinally polarized electrons from deuterium can in principle be a relatively clean probe of higher twist quark-quark correlations beyond the parton model. As first observed by Bjorken and Wolfenstein, the dominant contribution to the electron polarization asymmetry, proportional to the axial vector electron coupling, receives corrections at twist four from the matrix element of a single four-quark operator. We reformulate the Bjorken-Wolfenstein argument in a matter suitable for the interpretation of experiments planned at the Thomas Jefferson National Accelerator Facility (JLab). In particular, we observe that because the contribution of the relevant twist-four operator satisfies the CallanGross relation, the ratio of parity-violating longitudinal and transverse cross sections, R γ Z , is identical to that for purely electromagnetic scattering, R γ , up to perturbative and power-suppressed contributions. This result simplifies the interpretation of the asymmetry in terms of other possible novel hadronic and electroweak contributions. We use the results of MIT Bag Model calculations to estimate contributions of the relevant twist-four operator to the leading term in the asymmetry as a function of Bjorken x and Q 2 . We compare these estimates with possible leading twist corrections from violation of charge symmetry in the parton distribution functions.

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“…The resulting expression for the asymmetry, known as the Cahn-Gilman (CG) formula [3], is given at tree level by 1 …”

Section: Overviewmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering

2010

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“…In fact, in the 1970s parity-violating deep inelastic scattering (PVDIS) on the deuteron provided an important early confirmation of the standard model of particle physics [1,2].…”

Section: Introductionmentioning

confidence: 99%

Finite-Q2corrections to parity-violating DIS

Hobbs

Melnitchouk

2008

Phys. Rev. D

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Parity-violating deep inelastic scattering (PVDIS) has been proposed as an important new tool to extract the flavor and isospin dependence of parton distributions in the nucleon. We discuss finite-Q 2 effects in PVDIS asymmetries arising from subleading kinematical corrections and longitudinal contributions to the γZ interference. For the proton, these need to be accounted for in order to accurately extract the d/u ratio at large x; for the deuteron they are important to consider when searching for evidence of charge symmetry violation in parton distributions or signals for physics beyond the standard model. We further explore the dependence of PVDIS asymmetries for polarized targets on the u and d helicity distributions at large x.

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“…93 Hasert et al1973. 94 For instance, Prescott et al 1978, andFanchiotti &Sirlin 1990. 95 Arnison et al 1983. In this final section, by taking stock of the previous conclusions, I shall offer a comparative analysis of the works that contributed to the construction process of the mass-generation mechanism.…”

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confidence: 98%

The construction of the Higgs mechanism and the emergence of the electroweak theory

Karaca

2013

Studies in History and Philosophy of Science Part B: Studies in

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I examine the construction process of the Higgs mechanism and its subsequent use by Steven Weinberg to formulate the electroweak theory in particle physics. I characterize the development of the Higgs mechanism to be a historical process that is guided through analogies drawn to the theories of solid-state physics and that is progressive through diverse contributions from a number of physicists working independently. I also offer a detailed comparative study that analyzes the similarities and differences in these contributions. IntroductionThe concept of "spontaneous symmetry breaking" (SSB) as used in (relativistic) quantum field theory was inspired from the vacuum-structure of the Bardeen-Cooper-Schrieffer(BCS) theory of superconductivity in solid-state physics. 1 As physicists Yoichiro Nambu 2 and Giovanni JonaLasinio 3 once remarked, the integration of SSB into the theoretical framework of quantum field theory illustrates a case of "cross-fertilization" between solid-state physics and particle physics through the sharing of a physical concept. The integration process of SSB has been discussed in 1 Barden et al. 1957 2 a joint paper 4 by Laurie Brown and Tian Yu Cao, which has also accounted for the emergence of SSB as a physical concept and its early use in solid-state physics. What constitutes the final step in this integration process is the construction in the sixties of what is today referred to as "Higgs mechanism" in the literature of modern physics. This was achieved through diverse contributions from different physicists working independently. Even though the aforementioned paper by Brown and Cao is very helpful and thorough in many respects, it does not engage in a detailed examination of the similarities and the differences that exist between the approaches taken in these contributions. 5 Nor does it discuss their convergence to the Higgs mechanism as well as to the formulation of the electroweak theory by Steven Weinberg in 1967. All these as-yetunaddressed historical issues call for a critical study of the development of the Higgs mechanism that is currently missing from the literature of history and philosophy of modern physics. 6 In the present paper, I shall undertake a detailed comparative study of the works that contributed to the development of the Higgs mechanism. Moreover, in parallel to this discussion, I shall also trace the development of the electroweak theory as the unified theory of electromagnetic and weak forces.The plan of the present paper is roughly as follows. In Section 2, I shall give a short summary of the failure of the V-A theory of weak interactions. In Section 3, I shall dwell on Glashow's work on a unified theory of weak and electromagnetic forces. I shall also discuss the zero-mass problem of the Yang-Mills theory and how it plagued Glashow's work. In Section 4, I 3 shall examine in detail the construction process of the Higgs mechanism that solved the zeromass problem. In Section 5, I shall describe the formulation of the electroweak theory by Weinberg on t...

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Parity non-conservation in inelastic electron scattering

Cited by 638 publications

References 11 publications

Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering

Examination of higher-order twist contributions in parity-violating deep-inelastic electron-deuteron scattering

Finite-Q2corrections to parity-violating DIS

The construction of the Higgs mechanism and the emergence of the electroweak theory

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