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Behold the 'Glueball,' a Strange New Form of Matter

12 hours ago
sciencehabit shares a report from Science Magazine: For more than half a century, physicists have searched for one of the strangest particles predicted by modern theory. It would be made almost entirely of gluons, the elusive subatomic particles that carry the strong nuclear force. Now, using a particle collider in Beijing, researchers say they have effectively proved the existence of such a "glueball." In a preprint posted last month on arXiv and in a presentation last week at the International Conference on High Energy Physics (ICHEP), the researchers argue that a particle called X(2370), which they produced by smashing electrons into positrons at high energies, has the properties expected of a glueball. "It's an experimental triumph," says Colin Morningstar, a particle physicist at Carnegie Mellon University who was not involved in the finding. "It's the strongest evidence yet that particles dominated by a glueball component can exist in nature."

Read more of this story at Slashdot.

BeauHD

Branching Paths

12 hours 30 minutes ago

"You submitted a pull request."

Indika was, in fact, reviewing the comments she'd gotten on that very same pull request, when her boss, Bill, walked up behind her. What she didn't understand is why Bill said it like it was an accusation.

"Yes?" she replied.

"Okay, well, we don't do that here. You're new, so I'll let it slide, but please review the developer guide."

Well, Indika had reviewed the developer guide, or at least thought she had. As it turned out, there was the official, company wide developer guide. That's the one she'd read. But Bill maintained his own, for his team. He hadn't ever told her about it, but apparently assumed she'd have the oracular blessings of Apollo and find it by herself.

It had this to say:

Branching is prohibited. Merging is a time wasting activity and goes against CI principles. Only use git to commit, push, and pull.

And rebase, presumably, if everyone was just committing on the main branch?

Indika asked one of her co-workers, Elise, over coffee: "Is this real?"

"Yeah," Elise said. "I'm not sure how he found out about your PR, I don't think anybody added him to the review. I mean, why would they?"

"Oh, I sent him the link," Indika said. "Just a whole, 'I'm new here, look at me doing the work!' type heads up."

"Oh yeah, definitely don't do that."

"So we do use PRs?"

Elise nodded. "Of course we do. We're not crazy. We just make sure Bill never finds out."

That seemed like a terrible way to work, but Indika went along with it, at least for a few weeks. Then an opportunity presented itself; she and Bill bumped into each other in the kitchenette grabbing coffee, and nobody else was around. At this point, Indika had already submitted a number of PRs without Bill knowing.

"Bill, I've been meaning to ask, what's your rationale for prohibiting branching?"

Bill loved being asked that question. "Well, well, it comes from twenty years of experience. What exactly does a branch get you?"

"A distinct history of changes that can be maintained and eventually merged in once a large unit of work has been done without disrupting other work that might be in flight?"

"Another point of conflict! A chance for the code you're working on to get stale. A chance to fall behind the rest of the team. Now, for a large open source team, with a lot of collaborators, a branch might make sense. I'm skeptical, but I can at least understand it. But for our internal team? It's just developers seeing a new toy and going, 'oh, shiny!'"

Indika sipped her coffee and went back to her desk. She was fortunate to have a window nearby, and looked at the squirrels playing in the branches of the tree.

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