Alexey Petrov

New paper! This is a review article prepared for the upcoming Encyclopedia of Particle Physics. 🧪

inspirehep.net/literature/3...

New paper! Together with Arnau Bas i Beneito and Svjetlana Fajfer we study baryon number violating mixing of a Lambda baryon with its antiparticle. We show that indirect constraints on Lambda-antiLambda oscillations preclude its observation at colliders. 🧪

inspirehep.net/literature/3...

YouTube video by MindofMatthew I Will Derive!

For those students in calculus-based physics classes 🧪

youtu.be/P9dpTTpjymE?...

Not exactly. For some reason, STCF and CEPC were put as direct competitors for this five year budget - despite very different scale of those projects. And I bet the CEPC decision was influenced by the fact that CERN has not made a final decision regarding the FCC. STCF has no competition.

CEPC matures, but approval is on hold – CERN Courier The Circular Electron–Positron Collider (CEPC), a 100-km electron–positron “Higgs factory” proposed in China, has reached the technical-design stage but will not be included for approval or constructi...

Big news: China will not include Circular Electron-Positron Collider (CEPC), a proposed Higgs factory, in the next five-year plan. According to the article, “China will consider other large science projects […] including a proposed Super Tau–Charm Facility” - a good news for flavor physics. 🧪

???

For what? The slashed PhD positions are those that used to be paid for by the federal grants provided to do research in STEM and other fields

Harvard is hit hard… 🧪
www.thecrimson.com/article/2025...

The Wombot and the Wombats Ig Nobel Prize winner Scott Carver, at the University of Tasmania, and colleagues demonstrate and explain the wombot—their wombat-sized robot for wombat research—in action, in this ABC News report:…

Today, October 22, is International Wombat Day! Happy IWD!

Let me remind you that wombat-related research led to an IgNobel prize in 2019

improbable.com/2021/07/23/t... 🧪

Note that physics is NOT among those…

www.visualcapitalist.com/the-most-und...

Next week is the Nobel week! Let’s speculate on who might get the Physics prize this year?

My pick: Aharonov and Berry
🧪

A cool car that I saw in Germany. You can park everywhere - and if there is no parking spot available, you just put it in your backpack!

We have projectors in the walls and use laptops at the tables

Our two brand new Technology-Enhanced Active Learning (TEAL) labs are (almost) ready to welcome new students next week! We use them to teach Studio Physics at the University of South Carolina 🧪

Nuclear reactor on the Moon! 🧪

Cat or Particle Physics Experiment Do you know whether it's the name of the cat shown or of a particle physics experiment? Quiz made by William Barter, using cat photos provided by colleagues in the University of Edinburgh PPE group.

Is it the name of a cat or the name of a particle physics experiment?
forms.gle/f3mGxKjt6jAe...

Could be — glueballs are the primary example. But not in this case. If there is a new boson whose mass is twice the mass of a top quarks and the quantum numbers of a top pair, then, according to Quantum Mechanics, they would mix.

Actually, Barry had a nice paper doing that for the QED case. Maybe one can generalize it to trabe and QCD. Do you want to talk about it?

I was sure someone actually looked into that… but maybe not. But it’s not just the coupling - at threshold the Higgs exchange generates a point interaction - so one gets additional 1/m_H^2 suppression. One can resum those, just like for the deuteron (delta-function potential).

I thought about the Higgs exchange… but it should not be stronger than the usual QCD Sommerfeld enhancement. IMHO, the 1/v effect for non-relativistic top quarks should produce the feature that they see… what do you think?

Why do you call the threshold feature a bound state?

Europe is wooing American researchers with funding as the Trump administration cancels grants 🧪

t.co/EvQ9P6AmPf

Fiery object lights up skies over South Carolina, other parts of the Southeast A fiery object in the sky was seen by many in the South Carolina Midlands on Thursday afternoon. And it appears the object was seen across the Southeast

Is this one of the meteors from the Bootid Meteor Shower? What do you think? 🧪

www.wltx.com/article/tech...

Yes, this is unfortunate. If the current trend continues, the European scientists would have no will to travel to the US, while US scientists would have no means/grants to travel to Europe…

53rd SLAC Summer Institute (SSI 2025) The SLAC Summer Institute (SSI) is an annual two-week-long Summer School tradition since 1973. The theme of the 53rd SLAC Summer Institute is “Pathways to New Physics”. Although the Standard Model is ...

The 2025 SLAC Summer Institute is online only? Is this change for this year or a permanent move? Curious as a 1996 SSI participant and a big fan… 🧪

indico.slac.stanford.edu/event/9605/o...

The 8-point vision from the Elementary Particle Physics review panel from the National Academies: muon collider and FCC 🧪

Muon g-2 announces most precise measurement of the magnetic anomaly of the muon The third and final result, based on the last three years of data, is in perfect agreement with the experiment’s previous results, further solidifying the experimental world average. This long-awaited...

“The latest experimental value of the magnetic moment of the muon from the Fermilab experiment is:
aμ = (g-2)/2 (muon, experiment) = 0.001 165 920 705 +- 0.000 000 000 114(stat.)+- 0.000 000 000 091(syst.)”

Amaing experimental precision! Also consistent with the SM… 🧪

news.fnal.gov/2025/06/muon...

Leinweber Foundation Announces Largest Gift Ever for Theoretical Physics Research /PRNewswire/ -- The Leinweber Foundation announces today gifts totaling $90 million to establish Leinweber Institutes for Theoretical Physics at four of the...

Leinweber Foundation’s greatest gift to theoretical physics: $90M to five institutes of theoretical physics at Michigan, U of Chicago, UC Berkeley, IAS, and MIT 🧪

www.prnewswire.com/news-release...

Exclusive: NSF faces radical shake-up as officials abolish its 37 divisions Changes seen as a response to presidential directives on what research to fund

This does not sound good, if true… what is the rational behind killing one of the most successful enterprises in this country - and I mean, science? 🧪

www.science.org/content/arti...

Europe pledges half a billion euros to lure scientists as Trump battles universities The European Union and France on Monday announced half a billion euros worth of incentives to lure scientists to the continent, seeking to profit from U.S. President Donald Trump's federal funding cuts and clashes with top U.S. universities.

While €500M is not that much in general, if directed towards young professors, it can drain the US talent pool. 🧪

www.reuters.com/science/eus-...