Searching for curvature pion radiation from protons in strongly magnetized pulsars

Fregolente, Douglas; Saa, Alberto

doi:10.1007/s10509-011-0848-x

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…The basic principle that particles emit synchrotron radiation in the form of any fields they interact with has been known for a long time, and the emission of synchrotron mesons has been calculated in simple approximations (Ginzburg & Syrovatskii 1965). There have been semiclassical calculations of the pro- duction of mesons (pions, kaons, and eta) from protons emitting synchrotron (Tokuhisa & Kajino 1999;Kajino et al 2014) and curvature (Berezinsky et al 1995;Fregolente & Saa 2012) radiation. But no full QED/QCD calculation has been done, so the energy losses of hadrons are essentially unknown for E ≫ E QED synch .…”

Section: Escape From the Accelerator Or Decay Inside It?mentioning

confidence: 99%

SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers

Lacki

2015

Preprint

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What is the meaning of the Fermi Paradox -are we alone or is starfaring rare? Can general relativity be united with quantum mechanics? The searches for answers to these questions could intersect. It is known that an accelerator capable of energizing particles to the Planck scale requires cosmic proportions. The energy required to run a Planck accelerator is also cosmic, of order 100 M ⊙ c 2 for a hadron collider, because the natural cross section for Planck physics is so tiny. If aliens are interested in fundamental physics, they could resort to cosmic engineering for their experiments. These colliders are detectable through the vast amount of "pollution" they produce, motivating a YeV SETI program. I investigate what kinds of radiation they would emit in a fireball scenario, and the feasibility of detecting YeV radiation at Earth, particularly YeV neutrinos. Although current limits on YeV neutrinos are weak, Kardashev 3 YeV neutrino sources appear to be at least 30-100 Mpc apart on average, if they are long-lived and emit isotropically. I consider the feasibility of much larger YeV neutrino detectors, including an acoustic detection experiment that spans all of Earth's oceans, and instrumenting the entire Kuiper Belt. Any detection of YeV neutrinos implies an extraordinary phenomenon at work, whether artificial and natural. Searches for YeV neutrinos from any source are naturally commensal, so a YeV neutrino SETI program has value beyond SETI itself, particularly in limiting topological defects. I note that the Universe is very faint in all kinds of nonthermal radiation, indicating that cosmic engineering is extremely rare.

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Section: Escape From the Accelerator Or Decay Inside It?mentioning

confidence: 99%

SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers

Lacki

2015

Preprint

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“…2. In fact, a systematic search in the ATNF pulsar catalogue for strongly magnetized stars that could accelerate relativistic protons up to the curvature pion production threshold reveals that the best candidate is the 16 ms pulsar J0537-6910, but the corresponding characteristic parameter χ = a/m p = 10 −6 is too small to give origin to observable signals [20] .…”

Section: Applicationsmentioning

confidence: 99%

Massive particle production from accelerated sources in high magnetic fields

Fregolente¹,

Saa²

2011

Proceedings of 4th School on Cosmic Rays and Astrophysics — PoS(CRA School)

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Non-electromagnetic emissions from high energy particles in extreme environments has been studied in the literature by using several variations of the semi-classical formalism. The detailed mechanisms behind such emissions are of great astrophysical interest since they can alter appreciably the associated energy loss rates. Here, we review the role played by the source proper acceleration a in the particle production process. The acceleration a determines the typical scale characterizing the particle production and, moreover, if the massive particle production is inertially forbidden, it will be strongly suppressed for a below a certain threshold. In particular, we show that, for the case of accelerated protons in typical pulsar magnetospheres, the corresponding accelerations a are far below the pion production threshold.

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Searching for curvature pion radiation from protons in strongly magnetized pulsars

Cited by 2 publications

References 17 publications

SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers

SETI at Planck Energy: When Particle Physicists Become Cosmic Engineers

Massive particle production from accelerated sources in high magnetic fields

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