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Matt Reece

@mreece

physicist, obsessed with axions. Boston resident. never had a twitter or a mastodon, but here I am, inexplicably.

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22.06.2023
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Latest posts by Matt Reece @mreece

Donald Trump does not care about civilians in the region or the safety of US Troops.

He’s illegally bypassing Congress and starting a war with Iran that has already killed dozens of children. This is unacceptable.

Congress must take action to rein in Trump and save lives.

28.02.2026 17:13 πŸ‘ 789 πŸ” 178 πŸ’¬ 30 πŸ“Œ 9
OCASIO-CORTEZ STATEMENT ON
TRUMP'S COMBAT OPERATIONS IN IRAN
"The American people are once again dragged into a war they did not want by a president who does not care about the long-term consequences of his actions. This war is unlawful. It is unnecessary. And it will be catastrophic.

"Just this week, Iran and the United States were negotiating key measures that could have staved off war. The President walked away from these discussions and chose war instead.President Trump flippantly acknowledged the possibility of American casualties, stating "that often happens in war.'

"Mr. President: this was not an inevitability. This is a deliberate choice of aggression when diplomacy and security were within reach. Stop lying to the American people.

"Violence begets violence. We learned this lesson in Iraq. We learned this lesson in Afghanistan. And we are about to learn it again in Iran. Bombs have yet to create enduring democracies in the region and this will be no different.

"In moments of war, our Constitution is unambiguous: Congress authorizes war. The President does not. I will do my part to uphold our Constitution by voting YES on Representatives Ro Khanna and Thomas Massie's War Powers Resolution. Every member of Congress must join us in rejecting this aimless war.

OCASIO-CORTEZ STATEMENT ON TRUMP'S COMBAT OPERATIONS IN IRAN "The American people are once again dragged into a war they did not want by a president who does not care about the long-term consequences of his actions. This war is unlawful. It is unnecessary. And it will be catastrophic. "Just this week, Iran and the United States were negotiating key measures that could have staved off war. The President walked away from these discussions and chose war instead.President Trump flippantly acknowledged the possibility of American casualties, stating "that often happens in war.' "Mr. President: this was not an inevitability. This is a deliberate choice of aggression when diplomacy and security were within reach. Stop lying to the American people. "Violence begets violence. We learned this lesson in Iraq. We learned this lesson in Afghanistan. And we are about to learn it again in Iran. Bombs have yet to create enduring democracies in the region and this will be no different. "In moments of war, our Constitution is unambiguous: Congress authorizes war. The President does not. I will do my part to uphold our Constitution by voting YES on Representatives Ro Khanna and Thomas Massie's War Powers Resolution. Every member of Congress must join us in rejecting this aimless war.

My statement on President Trump’s combat operations in Iran⬇️

28.02.2026 16:46 πŸ‘ 11109 πŸ” 3321 πŸ’¬ 367 πŸ“Œ 244

It would be cool to have a legislature that acted to defend its own constitutional prerogatives and, maybe as a treat, the interests of the people it represents too.

28.02.2026 13:36 πŸ‘ 6030 πŸ” 1247 πŸ’¬ 77 πŸ“Œ 38

Maura Healey desperately needs a primary

21.02.2026 12:59 πŸ‘ 73 πŸ” 16 πŸ’¬ 5 πŸ“Œ 0

Have you made other lectures for this class publicly available? I’ll be teaching QFT 1 in the fall so I’m starting to look for sensible approaches that don’t follow a textbook.

07.02.2026 14:21 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

All the examples I’ve found fall in the category you might call β€œshocking but not surprising.”

31.01.2026 22:48 πŸ‘ 33 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

No one told me working at Harvard would mean getting to read all the private emails between my colleagues and the world’s most famous pedophile.

31.01.2026 16:34 πŸ‘ 7 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

There's no ICE accountability without ending qualified immunity.

They're murdering people. There won't be justice for the lives they've stolen, but there must be accountability.

My bill with @markey.senate.gov would ensure families can sue the agents murdering their loved ones.

27.01.2026 21:02 πŸ‘ 5920 πŸ” 1407 πŸ’¬ 111 πŸ“Œ 81
Screenshot of post reading: These are not rogue agents. This is an all out assault on American life. ICE is a criminal organization that is entering homes without judicial warrants, detaining witnesses, and killing people. All at the direction of Trump. We must stop funding DHS. There is no other path forward.

Responding to post reading: The Tribune also says ICE has transported several witnesses into detention.

Screenshot of post reading: These are not rogue agents. This is an all out assault on American life. ICE is a criminal organization that is entering homes without judicial warrants, detaining witnesses, and killing people. All at the direction of Trump. We must stop funding DHS. There is no other path forward. Responding to post reading: The Tribune also says ICE has transported several witnesses into detention.

We must stop funding DHS.

24.01.2026 18:21 πŸ‘ 3632 πŸ” 844 πŸ’¬ 187 πŸ“Œ 50

To be fair, several years before ChatGPT, I read an application from someone who wanted to work with "Leonardo Schwartz," a cosmologist who doesn't exist. So some students can hallucinate on their own.

18.01.2026 02:39 πŸ‘ 10 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

You look at what Spanberger gets done in one day and it becomes even more depressing that Massachusetts gets stuck with a dud governor like Maura Healey

17.01.2026 22:01 πŸ‘ 62 πŸ” 5 πŸ’¬ 3 πŸ“Œ 2

Your colleague Sarah Shandera is one of the people who may have thought about this more recently.

16.01.2026 20:54 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Black hole formation in the context of dissipative dark matter Black holes with masses of $\rm 10^6-10^9~M_{\odot}$ dwell in the centers of most galaxies, but their formation mechanisms are not well known. A subdominant dissipative component of dark matter with s...

It’s definitely possible that a percent or so of dark matter is made up of dissipative stuff distinct from ordinary CDM, which could form large black holes by direct collapse. I did estimates of this a decade ago but never wrote it up. arxiv.org/abs/1812.03104 looks similar but I haven’t read it.

16.01.2026 20:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Text: β€œA friend said those of us who live in Minneapolis should write about what's going on here for folks who live elsewhere. You need to know that whether you're a Republican, Independent or Democrat, the Constitution is being violated by our federal government. This is not about catching criminals, or even deporting people. It is about punishing an entire state, including
citizens, for not supporting the president. Everyone in my part of Minneapolis is affected. On our streets, ICE is stopping people of color and demanding their papers. In America. US citizens do not have to prove citizenship to ICE. Yet people are being intimidated, some cases beaten up and detained, for requiring ICE to follow the law. ICE needs a judicial warrant to enter homes. Yet there are documented cases of them
ignoring the law - violating a bedrock constitutional principle. Americans of color are staying home, afraid to go to work, school, to grocery shop, or fill their cars with gas. This isn't just "illegals" or immigrants with valid work permits, it is citizens who have had their cars rammed by ICE for merely looking Hispanic. Businesses are closing. Schools are 50 percent full. When they are open, fascists are calling in bomb threats because the
president decided to make us a meme. After a daycare teacher with a valid work permit (through 2030) was snatched from her workplace, parents (and grandparents) have had to organize to watch their SCHOOLS, to make sure conditional rights are observed. This is being repeated throughout Minnesota. Imagine trying to do your job or live you life while also taking volunteer shifts to make sure the federal
government doesn't act extrajudicially.
Because of ICE's documented abuses, neighbors have organized to monitor federal actions. This observation is legal, as long as it doesn't interfere with a valid action. Yet since ICE killed Renee Good, they are increasingly stopping this observation, breaking car windows and …”

Text: β€œA friend said those of us who live in Minneapolis should write about what's going on here for folks who live elsewhere. You need to know that whether you're a Republican, Independent or Democrat, the Constitution is being violated by our federal government. This is not about catching criminals, or even deporting people. It is about punishing an entire state, including citizens, for not supporting the president. Everyone in my part of Minneapolis is affected. On our streets, ICE is stopping people of color and demanding their papers. In America. US citizens do not have to prove citizenship to ICE. Yet people are being intimidated, some cases beaten up and detained, for requiring ICE to follow the law. ICE needs a judicial warrant to enter homes. Yet there are documented cases of them ignoring the law - violating a bedrock constitutional principle. Americans of color are staying home, afraid to go to work, school, to grocery shop, or fill their cars with gas. This isn't just "illegals" or immigrants with valid work permits, it is citizens who have had their cars rammed by ICE for merely looking Hispanic. Businesses are closing. Schools are 50 percent full. When they are open, fascists are calling in bomb threats because the president decided to make us a meme. After a daycare teacher with a valid work permit (through 2030) was snatched from her workplace, parents (and grandparents) have had to organize to watch their SCHOOLS, to make sure conditional rights are observed. This is being repeated throughout Minnesota. Imagine trying to do your job or live you life while also taking volunteer shifts to make sure the federal government doesn't act extrajudicially. Because of ICE's documented abuses, neighbors have organized to monitor federal actions. This observation is legal, as long as it doesn't interfere with a valid action. Yet since ICE killed Renee Good, they are increasingly stopping this observation, breaking car windows and …”

People not in Minnesota: please read this excellent summary of what life is like in Minneapolis since the murderous scum ICE swarmed here. And more are on their way. By local reporter / writer / bike dude / legend @dbrauer.net .

13.01.2026 22:38 πŸ‘ 6669 πŸ” 3725 πŸ’¬ 22 πŸ“Œ 102

Reading another fine example of the Air Bud school of particle physics model-building, which rests not on physical principles (established or otherwise) but on "There's nothing in the rule book that says I can't..."

08.01.2026 15:58 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

But do the agencies have the administrative capacity and will to issue the funds Congress allocates? NASA didn’t even put out a call for proposals for most areas it funds last year. Even with money from Congress, there are no grant proposals for them to select.

07.01.2026 15:13 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

If we're doing "remake Boston to satisfy my personal preferences," my counterproposal is to cover all of I-90 between Herald St and Marginal Rd with a large park to make it more pleasant to walk between the South End and Chinatown.

05.01.2026 23:59 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Preview
New institute to strengthen fundamental physics research, collaborationβ€” Harvard Gazette Leinweber Institute for Theoretical Physics made possible by $20 million gift from the Leinweber Foundation.

Some news: Harvard is the 8th institution to receive a gift for theoretical physics from the Leinweber Foundation. We're excited to have a new, stable source of support for PhD students and postdocs, at a time when young researchers have been especially anxious about careers in science in the US.

23.12.2025 04:19 πŸ‘ 5 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

When we couldn't find the topics in the library, even at the university next door, he just mocked us. He told me "you'll never make it as a chemist." I was seriously demoralized by his teaching. Luckily I had other great science teachers so he failed to derail my interest completely.

22.12.2025 04:36 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Interesting to see Jeffrey Wigand's name in the discourse. To me, he was the 9th grade science teacher who took a class full of kids excited about science and did his best to make us hate it. Gave us challenging assignments with no explanation and refused to even point us to a book. 1/

22.12.2025 04:36 πŸ‘ 6 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Post image

European particle physics strategy update summary πŸ˜…

12.12.2025 16:08 πŸ‘ 13 πŸ” 6 πŸ’¬ 1 πŸ“Œ 1

Computer Modern ftw

10.12.2025 02:41 πŸ‘ 3 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0

Love when we order delivery from a restaurant, our food never arrives, the restaurant tells us we have to ask the delivery service for a refund, and the delivery service tells us we have to ask the restaurant for a refund, so we accept the loss and cobble together a quick meal ourselves like chumps.

05.12.2025 23:54 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Preview
Three takeaways for Boston from NYC’s congestion pricing scheme - The Boston Globe After a year of the first American program of its kind, there’s enough data to recommend the idea.

Congestion pricing in NYC has worked and has become popular. Cities like Boston should follow.

www.bostonglobe.com/2025/12/05/o...

05.12.2025 12:47 πŸ‘ 97 πŸ” 31 πŸ’¬ 4 πŸ“Œ 4

Is Brookline daycare that cheap? We’re paying $2.2k/month in Boston for one kid, and that’s on the cheap end of places we looked into. Some were over $4k/month.

05.12.2025 01:37 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

The Nobel Committee, seeking nominations: "We encourage you to take a wide perspective, including e.g. inventions and female candidates."

🀨

04.12.2025 19:55 πŸ‘ 4 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

I learned from one of the Nero Wolfe books that perfect scrambled eggs take 45 minutes to make, and realized that I don't have the patience.

03.12.2025 14:58 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

The trick is to buy the Amtrak tickets way in advance. Last minute, they can be ludicrously expensive, but ahead of time often cheaper than MBTA. It’s a bit weird that Amtrak takes much longer to go from Providence to Boston than the reverse, though.

01.12.2025 22:40 πŸ‘ 0 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0

"Let's just say I know the 6 bus very well."

30.11.2025 03:41 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0