Introducing a ‘Different Lives’ Approach to the Valuation of Health and Well-Being

We introduce a new different lives survey format, which asks respondents to rank hypothetical lives described in terms of longevity, health, happiness, income, and other elements of the quality of life. In this short paper, we show that the format is of policy relevance whether a mental state, preference satisfaction or extra-welfarist account of well-being is adopted and discuss some of the advantages the format has over standard formats, such as contingent valuation surveys and QALY-type methods. An exploratory survey indicates that the format is feasible and that health and happiness might be more important than income and life expectancy

Introducing a "Different Lives" Approach to the Valuation of Health and Well-Being

We introduce a new 'different lives' survey format, which asks respondents to rank hypothetical lives described in terms of longevity, health, happiness, income, and other elements of the quality of life. In this short paper, we show that the format is of policy relevance whether a mental state, preference satisfaction or extra-welfarist account of well-being is adopted and discuss some of the advantages the format has over standard formats, such as contingent valuation surveys and QALY-type methods. An exploratory survey indicates that the format is feasible and that health and happiness might be more important than income and life expectancy.

Would You Choose to be Happy? Tradeoffs Between Happiness and the Other Dimensions of Life in a Large Population Survey

A large literature documents the correlates and causes of subjective well-being, or happiness. But few studies have investigated whether people choose happiness. Is happiness all that people want from life, or are they willing to sacrifice it for other attributes, such as income and health? Tackling this question has largely been the preserve of philosophers. In this article, we find out just how much happiness matters to ordinary citizens. Our sample consists of nearly 13,000 members of the UK and US general populations. We ask them to choose between, and make judgments over, lives that are high (or low) in different types of happiness and low (or high) in income, physical health, family, career success, or education. We find that people by and large choose the life that is highest in happiness but health is by far the most important other concern, with considerable numbers of people choosing to be healthy rather than happy. We discuss some possible reasons for this preference

Directly detecting sub-GeV dark matter with electrons from nuclear scattering

Dark matter (DM) particles with mass in the sub-GeV range are an attractive alternative to heavier weakly-interacting massive particles, but direct detection of such light particles is challenging. If however DM-nucleus scattering leads to ionisation of the recoiling atom, the resulting electron may be detected even if the nuclear recoil is unobservable. We demonstrate that including this effect significantly enhances direct detection sensitivity to sub-GeV DM. Existing experiments set world-leading limits, and future experiments may probe the cross sections relevant for thermal freeze-out.Comment: 8 pages revtex4, 5 figures; v2: analysis updated to include constraints from XENON1T; accepted for publication in PR

A weighty interpretation of the Galactic Centre excess

Previous attempts at explaining the gamma-ray excess near the Galactic Centre have focussed on dark matter annihilation directly into Standard Model particles. This results in a preferred dark matter mass of 30-40 GeV (if the annihilation is into b quarks) or 10 GeV (if it is into leptons). Here we show that the gamma-ray excess is also consistent with heavier dark matter particles; in models of secluded dark matter, dark matter with mass up to 76 GeV provides a good fit to the data. This occurs if the dark matter first annihilates to an on-shell particle that subsequently decays to Standard Model particles through a portal interaction. This is a generic process that works in models with annihilation, semi-annihilation or both. We explicitly demonstrate this in a model of hidden vector dark matter with an SU(2) gauge group in the hidden sector.Comment: 5 pages, 4 figures. v2: Matches PRD version. Note: title of PRD version is "Interpretation of the Galactic Center excess of gamma rays with heavier dark matter particles

Establishing Repeatable Operation of a Centrifugal Compressor Research Facility for Aerodynamic Investigations

Dolan, Matthew P. M.S.M.E., Purdue University, August 2015. Establishing Repeatable Operation of a Centrifugal Compressor Research Facility for Aerodynamic Investigations. Major Professor: Dr. Nicole L. Key, School of Mechanical Engineering

Transplanckian Censorship and Global Cosmic Strings

Large field excursions are required in a number of axion models of inflation. These models also possess global cosmic strings, around which the axion follows a path mirroring the inflationary trajectory. Cosmic strings are thus an interesting theoretical laboratory for the study of transplanckian field excursions. We describe connections between various effective field theory models of axion monodromy and study the classical spacetimes around their supercritical cosmic strings. For small decay constants $f<M_p$ and large winding numbers $n>M_p/f$, the EFT is under control and the string cores undergo topological inflation, which may be either of exponential or power-law type. We show that the exterior spacetime is nonsingular and equivalent to a decompactifying cigar geometry, with the radion rolling in a potential generated by axion flux. Signals are able to circumnavigate infinite straight strings in finite but exponentially long time, $t\sim e^{\Delta a/M_p}$. For finite loops of supercritical string in asymptotically flat space, we argue that if topological inflation occurs, then topological censorship implies transplanckian censorship, or that external observers are forbidden from threading the loop and observing the full excursion of the axion.Comment: v2: refs added, fig 6 extended. published in JHEP. 28 pages, 7 figure