Search results for " asymmetry"
showing 10 items of 263 documents
Conservatism and Accounting Earnings
2015
The article refers to accounting conservatism and its relation with accounting earnings. After providing the conceptual background of the prudence concept, which is the basis of accounting conservatism, the paper introduces some more empirically testable concepts, known as conditional and unconditional conservatism. It also explains the economics behind this accounting practice, mainly associated to contracting due to the asymmetric information between managers and external stakeholders, but also linked to litigation risks, taxation, political and regulatory processes. After providing a brief explanation of the empirical measures of conservatism, it gives a summary of the vast empirical res…
Fluctuating asymmetry in bank vole populations (Rodentia, Arvicolinae) reflects stress caused by landscape fragmentation in the Mont-Saint-Michel Bay
2003
In intensively farmed, reclaimed areas (polders) of Mont-St-Michel Bay, France, bank voles (Clethrionomys glareolus) live in fragmented hedgerows, where populations are small and dispersal rates and genetic diversity are low. These small populations are likely to have been exposed to potential environmental and/or genetic stress. The sensitivity of development to stress can be measured by fluctuating asymmetry (FA). FA was calculated for three samples from a disturbed area and one sample from an adjacent, more connected and undisturbed landscape. Size FA was estimated from 16 measurements of the skull and teeth whilst shape asymmetry was estimated from the skull alone. Bank voles in fragmen…
Don't Tell Us: The Demand for Secretive Behaviour
2009
The matter studied here is how, and with what implications, people may decide that they do not want to be let into secrets that concern them. They could get the information at no cost but they refuse to know. The reasoning is framed in terms of principals and agents, with the principals assumed not to want to know the agents' secrets. For convenience, the context chosen for the exposition is mainly that of voters as principals and the government or the office-holders as agents. After some exploration of the motivations underlying the attitude of the principals, the paper focuses on the case when neither total secrecy nor total disclosure prevails. The demand for partial secrecy is analysed …
Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS
2019
Hadron leptoproduction in Semi-Inclusive measurements of Deep-Inelastic Scattering (SIDIS) on unpolarised nucleons allows one to get information on the intrinsic transverse momentum of quarks in a nucleon and on the Boer-Mulders function through the measurement of azimuthal modulations in the cross section. These modulations were recently measured by the HERMES experiment at DESY on proton and deuteron targets, and by the COMPASS experiment using the CERN SPS muon beam and a $^6$LiD target. In both cases, the amplitudes of the $\cos\phi_h$ and $\cos 2\phi_h$ modulations show strong kinematic dependences for both positive and negative hadrons. It has been known since some time that the measu…
Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider
2020
Particles beyond the Standard Model (SM) can generically have lifetimes that are long compared to SM particles at the weak scale. When produced at experiments such as the Large Hadron Collider (LHC) at CERN, these longlived particles (LLPs) can decay far from the interaction vertex of the primary proton–proton collision. Such LLP signatures are distinct from those of promptly decaying particles that are targeted by the majority of searches for new physics at the LHC, often requiring customized techniques to identify, for example, significantly displaced decay vertices, tracks with atypical properties, and short track segments. Given their non-standard nature, a comprehensive overview of LLP…
Unifying leptogenesis, dark matter and high-energy neutrinos with right-handed neutrino mixing via Higgs portal
2016
We revisit a model in which neutrino masses and mixing are described by a two right-handed (RH) neutrino seesaw scenario, implying a strictly hierarchical light neutrino spectrum. A third decoupled RH neutrino, $N_{\rm DM}$ with mass $M_{\rm DM}$, plays the role of cold dark matter (DM) and is produced by the mixing with a source RH neutrino, $N_{\rm S}$ with mass $M_{\rm S}$, induced by Higgs portal interactions. The same interactions are also responsible for $N_{\rm DM}$ decays. We discuss in detail the constraints coming from DM abundance and stability conditions, showing that in the hierarchical case ($M_{\rm DM} \gg M_{\rm S}$) there is an allowed window on $M_{\rm DM}$, which necessar…
Correlating Schiff Moments in the Light Actinides with Octupole Moments
2018
We show that the measured intrinsic octupole moments of $^{220}$Rn, $^{224}$Ra, and $^{226}$Ra constrain the intrinsic Schiff moments of $^{225}$Ra$^{221}$Rn, $^{223}$Rn, $^{223}$Fr, $^{225}$Ra, and $^{229}$Pa. The result is a dramatically reduced uncertainty in intrinsic Schiff moments. Direct measurements of octupole moments in odd nuclei will reduce the uncertainty even more. The only significant source of nuclear-physics error in the laboratory Schiff moments will then be the intrinsic matrix elements of the time-reversal non-invariant interaction produced by CP-violating fundamental physics. Those matrix elements are also correlated with octupole moments, but with a larger systematic u…
"Table 2" of "The spin-dependent structure function g1(x) of the deuteron from polarized deep-inelastic muon scattering."
1997
The virtual-photon deuteron cross section asymmetry A1 from the combined SMC data. Statistical errors only.
"Table 1" of "A New measurement of the spin dependent structure function g1(x) of the deuteron"
1995
Results on the virtual photon deuteron asymmetry.
"Table 1" of "The Spin-dependent Structure Function of the Proton g_1^p and a Test of the Bjorken Sum Rule"
2017
Values of $A_1^p$ and $g_1^p$ as a function of $x$ with corresponding average values of $Q^2$.