28/2/2014 84.5% of mass (dark matter) is massive right-handed neutrinos | Quantum field theory

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Quantum field theory

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84.5% of mass (dark matter) is massive right-handed neutrinos

FEBRUARY 28, 2014 | NIGEL COOK | 1402.2301, DARK MATTER,HTTP://ARXIV.ORG/PDF/1402.2301V1.PDF, NEUTRINOS, RESONANCES, RIGHT HANDEDNEUTRINOS, STANDARD MODEL, STRASSLER, WOIT | LEAVE A COMMENT

(http://nige.files.wordpress.com/2014/02/right-handed-neutrinos.gif)

See links here (http://arxiv.org/pdf/1402.2301v1.pdf), here

28/2/2014 84.5% of mass (dark matter) is massive right-handed neutrinos | Quantum field theory

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See links here (http://arxiv.org/pdf/1402.2301v1.pdf), here(http://resonaances.blogspot.co.uk/2014/02/signal-of-neutrino-dark-matter.html), here(https://www.math.columbia.edu/~woit/wordpress/?p=6737), here(http://profmattstrassler.com/2014/02/18/x-rays-from-dark-matter-a-little-hint-for-you-to-enjoy/)

and here (http://profmattstrassler.com/2013/10/31/questions-and-answers-about-dark-matter-post-lux/). The hard fact is: massive right handed neutrinos don’t contribute much to weak interactionsbecause of their immense mass, but do interact with gravity unlike massless left handed neutrinos. I

can’t understand why dark matter (https://en.wikipedia.org/wiki/Dark_matter) in the form ofmassive right handed neutrinos isn’t already considered a confirmed fact, based on experimentalevidence of neutrino flavor mixing! (See my discussion of massive right handed neutrino lifespanevidence below.)

Right handed neutrinos are implied by neutrino flavor mixing data and the see-saw mechanism forneutrino mass: left handed neutrinos are massless, right handed neutrinos are massive, so the smallapparent (“observed”) masses of neutrinos are an average over time for oscillations between the

briefly-existing massive right-handed neutrinos (which, due to their large mass, have a short mean-free-path before transforming back into massless left-handed neutrinos in the vacuum) and thelonger-existing (massless) left handed neutrinos, which can only undergo weak interactions!

The (large) mass of right-handed neutrinos makes them couple to the gravity field, not only theweak interaction; but the lack of mass of left-handed neutrinos ensures that those merely couple tothe weak force, not gravity. This asymmetry in couplings for the two kinds of neutrinos isresponsible for the small observable apparent mass of neutrinos, which is simply a time-averagesuperposition between both of the states. I don’t understand how anyone can accept the model forneutrino oscillation between between left and right handed states, if they don’t accept that bothstates have at least one interaction (i.e. Standard Model weak charge) in common, so I disagreestrongly with Peter Woit’s statement that right-handed massive neutrinos don’t undergo weak (orany other S.M.) interactions:

Right-handed neutrino fields fit naturally into the SM pattern of fundamental fields, but withzero SU(3)xSU(2)xU(1) charges. That such fields have something to do with dark matter looksmore promising than the SUSY or axion proposals of introducing a new and different sector offields. – Woit (https://www.math.columbia.edu/~woit/wordpress/?p=6737)

I disagree that right-handed neutrinos need to have a lack of weak charge: their short life (due totheir mass) reduces the effective weak charge of right-handed neutrinos, simply because they aren’tthere for long, as compared to left-handed neutrinos! So I very much prefer Professor MattStrassler’s far more cautiously-worded comment about right handed neutrinos:

… the dark matter particles are kind of like neutrinos — they’re fermions, like neutrinos, and theyare connected to neutrinos in some way, though they aren’t as directly affected by the weaknuclear force. (http://profmattstrassler.com/2014/02/18/x-rays-from-dark-matter-a-little-hint-for-you-to-enjoy/) [Emphasis added to key words.]

The fact that the right-handed neutrinos “aren’t as directly affected by the weak nuclear force” asleft-handed neutrinos is simply down to their short-lifetime due to their immense mass.

The lifetime for spontaneously produced particles of mass m in vacuum is only h-bar/(mc^2)seconds, whereas left handed neutrinos are massless and therefore have an effectively infinitelifetime, and so they remain unchanged until they undergo a weak interaction with either a flavour-

28/2/2014 84.5% of mass (dark matter) is massive right-handed neutrinos | Quantum field theory

http://nige.wordpress.com/2014/02/28/some-early-experimental-evidence-that-84-5-of-the-universes-mass-dark-matter-is-massive-right-handed-neutrinos/ 3/3

changing, massive, short-lived right-handed neutrino in the vacuum, or else a Standard Model weakcharge.

Since the massive Standard Model charges that form ordinary matter are long lived (notspontaneous pair-production short-life particles in the vacuum), their weak charge cross-sections aremore apparent, simply because they last far than those of massive right-handed neutrinos, a simplefact that apparently appears so “facile” to some highly technical dudes, that no effect is made tograsp it at all!

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