John Donoghue
@jfdonoghue.bsky.social
π€ 399
π₯ 85
π 41
Theoretical physics. University of Massachusetts.
https://websites.umass.edu/donoghue/
reposted by
John Donoghue
Quanta Magazine
24 days ago
For 48 years, physicists largely ignored a theory of gravity that was riddled with ghosts, nonsensical-seeming particles that have a negative probability of arising. Recent work by John Donoghue and Gabriel Menezes has helped reinvigorate the theory.
www.quantamagazine.org/old-ghost-th...
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This is a good article about a subtle topic in quantum gravity.
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28 days ago
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This is my talk at the Campagna conference
www.pifp2025.it/home
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5 months ago
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This was quite an interesting and well organized conference.
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5 months ago
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I havenβt seen it mentioned here yet, but we have gotten word from CERN that both Mary K Gaillard and Jonathan Rosner have died. Their paper with Ben Lee was the entry to charm physics for so many of us, but each had separately a large impact on particle physics.
7 months ago
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reposted by
John Donoghue
Zhongbo Kang
11 months ago
Great news! Gauge Theory of Elementary Particle Physics by Ta-Pei Cheng and Ling-Fong Li (Oxford) is now OPEN ACCESS! π You can read and download it for free using the PDF link below. πβ¨
fdslive.oup.com/www.oup.com/...
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I don't mean to keep harping on my books, but I just noticed that my QFT book with Lorenzo Sorbo "A Prelude to Quantum Field Theory" is presently discounted to only $22.37 on the Princeton University Press website. Seems to be a good price.
press.princeton.edu/books/ebook/...
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A Prelude to Quantum Field Theory
A concise, beginner-friendly introduction to quantum field theory
https://press.princeton.edu/books/ebook/9780691223506/a-prelude-to-quantum-field-theory
11 months ago
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This was posted due to the news that Gene Golowich has passed away. A sad event an an end of an era for many of us.
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11 months ago
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Thanks for highlighting this. I had felt that it was mostly forgotten. Also thanks for doing these posts throughout December - I have enjoyed them and saved many for further study.
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12 months ago
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My new paper giving reasons why the cosmological constant and Newton's constant should not be treated as running parameters in physical processes.
arxiv.org/abs/2412.08773
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Do $Ξ_{CC}$ and $G$ run?
No. In this brief pedagogic note, I describe why the cosmological constant and Newton's constant are not running parameters in physical reactions.
https://arxiv.org/abs/2412.08773#
about 1 year ago
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Astro/cosmo folks: Does anyone have an informed opinion on this work which says that the recent DESI result on running dark energy depends heavily on a couple of outlier points. The authors give the appropriate caveats, but it seems important.
arxiv.org/abs/2412.01740
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Outliers in DESI BAO: robustness and cosmological implications
We apply an Internal Robustness (iR) analysis to the recently released Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillations dataset. This approach examines combinations of data sub...
https://arxiv.org/abs/2412.01740
about 1 year ago
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This should be good. The first few chapters can be previewed on the CUP site
cup.org/3XTHKLC
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Steven Weinberg: A Life in Physics | Theoretical physics and mathematical physics
https://cup.org/3XTHKLC
about 1 year ago
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I am moving here from Twitter. That site is too full of misinformation and unhappiness. It is part of the problem and hopefully moving here can recreate a portion of the Science Twitter experience.
about 1 year ago
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