The Compton amplitude is calculated in terms of expectation values of light–ray quark operators. As a technical tool we apply the nonlocal light–cone expansion. Thereby we express the expectation value of the vector light–ray operator with the help of the expectation value of the corresponding scalar operator of twist 2. This allows important simplifications. In the limit of forward scattering ...

The group theory of the spontaneous breaking of SU(N) is explored. Two specific cases are analyzed in detail: (i) SU(N) is broken to SO(N) via a scalar field vacuum expectation value for a second-rank symmetric tensor multiplet, and (ii) SU(2N) or SU(2N +1) is broken to Sp(2N) via a scalar field vacuum expectation value for a secondrank antisymmetric tensor multiplet. The case of the spontaneou...

It is known that the high–energy quark–quark scattering amplitude can be described by the expectation value of two lightlike Wilson lines, running along the classical trajectories of the two colliding particles. Generalizing the results of a previous paper, we give here the general proof that the expectation value of two infinite Wilson lines, forming a certain hyperbolic angle in Minkowski spa...

I propose a scheme for reconstructing the weak value of an observable without the need for weak measurements. The post-selection in weak measurements is replaced by an initial projector measurement. The observable can be measured using any form of interaction, including projective measurements. The reconstruction is effected by measuring the change in the expectation value of the observable due...

This paper introduces the concept of the mobile value core that is based on Expectation Confirmation Theory. The mobile value core determines the value relationships between mobile technology provision and mobile technology usage with special regard to value expectations, value perceptions and actual value creation. Creation of mobile value requires mobile co-creation methods and tools to achie...

Given a probability distribution {pi}i 1,2,...,W , that is, 0 ≤ pi ≤ 1 i 1, 2, . . . ,W and ∑W i 1 pi 1, the ordinary expectation value of a quantity Q of a system under consideration is defined by ∑W i 1 piQi, where W is the total number of accessible states and is enormously large in statistical mechanics, typically being 210 23 . In the field of generalized statistical mechanics for complex ...

Citation Donoghue, John F. et al. "Likely values of the Higgs vacuum expectation value. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. We make an estimate of the ...

No-go theorems assert that hidden-variable theories, subject to appropriate hypotheses, cannot reproduce the predictions of quantum theory. We examine two species of such theorems, value no-go theorems and expectation no-go theorems. The former assert that hidden-variables cannot match the predictions of quantum theory about the possible values resulting from measurements; the latter assert tha...

We point out that the expansion of the universe leads to a cosmological time evolution of the vacuum expectation of the Higgs boson. Within the standard model of particle physics, the cosmological time evolution of the vacuum expectation of the Higgs leads to a cosmological time evolution of the masses of the fermions and of the electroweak gauge bosons while the scale of Quantum Chromodynamics...

The mechanism of gaugino condensation has emerged as a prime candidate for supersymmetry breakdown in low energy effective supergravity (string) models. One of the open questions in this approach concerns the size of the gauge coupling constant which is dynamically fixed through the vev of the dilaton. We argue that a nontrivial gauge kinetic function f(S) could solve the potential problem of a...