Of Particular Significance

Author: Matt Strassler

My friend and colleague Sean Carroll, of the Cosmic Variance blog, who has a very good new book about the Higgs particle and its discovery, is being interviewed by Alan Boyle today as part of the Virtually Speaking Science series.  Listen live 9 pm eastern | 6 pm pacific, or later, at http://www.blogtalkradio.com/virtually-speaking-science/2012/09/06/sean-carroll-alan-boyle .  Sean is an excellent speaker and writer; highly recommended!

And I myself am giving a public lecture about the Quest for the Higgs Particle this Saturday, September 8th, 1 p.m. New York time/10 a.m. Pacific, through the MICA Popular Talks series, held online at the Large Auditorium on StellaNova, Second Life.  You’ll need a Second Life viewer to watch it live.  Should you miss it, both the audio and the slides will be posted later for you to look at.  (I gave one of these talks, on the Large Hadron Collider, back in April, but the sound quality over the web was a bit problematic; hopefully it will be better this time.)

 

 

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON September 5, 2012

If you’ve just gotten back from vacation, perhaps after days or weeks seeking the perfect wave, well, what a treat awaits! So much reading to do, about such interesting things. I’m writing a set of articles, intended for the reader who has once-upon-a-time seen beginning physics (what we in the U.S. would call “freshman physics”, or even a good “advanced placement physics” course pre-university) with the goal of explaining what fields and particles are. Five of the seven or eight articles are done; four appeared over the last two weeks, and now there’s a new one:

  1. Ball on a Spring (Classical)
  2. Ball on a Spring (Quantum)
  3. Waves (Classical Form)
  4. Waves (Classical Equation of Motion)
  5. Waves (Quantum) — the new one.

After this: an article on Fields, and then one on Particles, and maybe one more with some follow-up information.  And then, with this set complete, I’ll move on to another series of articles, about how the Higgs field works…

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON September 4, 2012

On Monday I started a series of articles to explain particles and fields, aimed at those who’ve had a little bit of physics in their past (perhaps a semester or two just before or just at the beginning level at a university), and containing a very little amount of math.

I first brought you the story of the ball on a spring, both the classical [i.e. pre-quantum] version from the 1700s and the quantum version from the early 1900s.

Now it’s time to turn to waves. This is the longest subject I’ll have to cover, I think, so I split even the pre-quantum story of waves up into two parts, one aimed at getting the right formula for describing a wave, and the other at getting the right equation of motion for which that formula is a solution. If you’ve had first-year physics you’ve seen most of this, but there’s a twist toward the very end that is probably novel — you’ll see a wave equation you’ll probably recognize, but also one that, quite possibly, you haven’t seen before.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 30, 2012

One of my current goals is to explain how the Higgs field works to anyone who’s learned a bit of physics at the beginning-university or advanced pre-university level. As a step toward the goal, I am creating a set of pages that explain how fields work, why quantum mechanics implies that sufficiently simple fields have particles, and which aspect of a field’s behavior determines the masses of its particles.  You will find that knowing a little physics and a little math is helpful.

[I’m afraid that most of you who never had a beginning physics class at all will have to be patient. It’s an even greater challenge for me to explain the Higgs field to someone who’s allergic to math, or hasn’t had much math yet; I’m hoping my current efforts will help me see how surmount that challenge.  But meanwhile you might like to read my Higgs FAQ and my popular article on Why the Higgs Particle Matters.]

The first step is to remember how a ball on a spring works — one of the first things one learns in any physics class — and then learn a little bit about how quantum mechanics changes the answer — one of the first things one learns in a quantum mechanics class.  This is where the concept of a “quantum” first makes its appearance in physics.  Those articles are now ready for you to look at.  The next step [waves, both without and with quantum mechanics] will follow over the coming week.

Note: I’ve included, for the first time on this website, some animated gifs among the figures.  These should animate when you click on them.  I know they need improvement; over the next day I’ll be trying to make them faster to load and run.  Please be patient and let them load; but do let me know if you can’t make them work at all, and if so, what browser and hardware you’re using.  Update: they should be much faster now.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 27, 2012

The huge Milner prizes for nine well-known scientists, and the controversy they generated, have motivated me to relate a story.  It happened during the theorist/experimentalist workshop that was held in early August (see also here) at the Perimeter Institute in Waterloo, Canada.  And it illuminates something that many scientists, science commentators and science journalists, as well as science fans in the public, seem to be unaware of, but ought to know.

Before I start, I want to make one thing clear.  I am by no means a flag waver for the string theory community; the theory’s been spectacularly over-hyped, and the community’s political control of high-energy physics in many U.S. physics departments has negatively impacted many scientific careers, including my own.  On the other hand, I am also not going to tell you that string theory, as a theory, is somehow evil incarnate; I have done a certain amount of string theory research, and not only have I learned a great deal from it that I could not have learned any other way, doing the research had a positive effect on my career.  So I feel it is unfortunate that string theory has been a political football, with two violent teams trying to kick the ball toward their opponents’ goal posts.   From my perspective, the game is irrational and preposterous, reasonable people were long ago refusing to play it, and it is high time the ball were grabbed by the referee and placed quietly in the middle of the field where it belongs.

My story takes place on the evening of Friday, August 3rd, following the second day of the workshop, which brought together theorists and CMS experimentalists for discussions concerning research strategies at the Large Hadron Collider [LHC].  (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 15, 2012

I highly recommend Steve Myers’ article http://www.poynter.org/latest-news/mediawire/184802/are-jonah-lehrers-scientific-errors-worse-than-fabricating-quotes/

Why is it that when a scientist makes up scientific information, he or she is fired, but when a journalist or writer makes up scientific information, he or she is promoted and ends up making lots of money with a best-seller? And why is mis-quoting Bob Dylan so vastly worse than widely mis-representing and twisting facts, even making up facts, about science and putting some of them in a book?

That Jonah Lehrer put multiple mistakes and perhaps inventions into a book called “Imagine” is highly amusing.  And remember his naive article in the New Yorker that was billed as “Is There Something Wrong With The Scientific Method?” Well, “Is there something wrong with my science journalism?” might have been the real question.

Malcolm Gladwell described Lehrer (on the “Imagine” jacket cover) as “knowing more science than a lot of scientists.”   I am afraid this now in turn raises serious questions about Mr. Gladwell’s own knowledge and judgment.  The New Yorker also has big questions to answer; I don’t think you should be too quick to get your science journalism there.

Meanwhile, what was Fareed Zakaria thinking?  The famous writer believing that he could steal paragraphs from another living and famous writer and not be noticed?  Of course he believed it, he’d gotten away with it before in broad daylight, and most of us hadn’t heard about it.  Suspension?  No, promotion! Note Added 8/15: The last bit here has been called into question by a commenter, referring me to this link that claims that the accusations made against Zakaria in the above link were unfair.  It doesn’t change the fact that Zakaria did pilfer from Jill Lapore, as he has admitted to doing, and that I’ve lost my trust in his work.  And I remain dubious that it’s the first time he’s ever done this in his long career.

“You can fool all of the people some of the time, and you can fool some of the people all of the time, but you cannot fool all of the people all of the time.”

Regrettably, I myself had a post on this site that linked to one of Zakaria’s articles; I no longer have any reason to trust the man’s judgment and integrity, and so I have updated the post to mark it as suspect.  And I would suggest you ignore everything he writes in future.  Same with Lehrer, of course.

It seems highly unlikely that these deceptions were aberrations; apparently these people managed to make their way to the top partially by subterfuge. And people currently at the top are allowing young charlatans to rise to the top, or at least are unable to prevent their rise.  That is extremely distressing.

In physics, fortunately, getting to the top by ruse and swagger and charm and exaggeration remains extremely difficult to do (though examples do occur; one of my friends caught this guy because his plots looked weird) — because your colleagues, knowing you are human and that you can make mistakes, don’t assume that you’re right when you make a claim about something.  At some point along the way, before they rely on your work, they check it.  (That’s why it is so important that TWO experiments at the Large Hadron Collider have such strong and largely independent evidence for the existence of a Higgs-like particle.) Such standards may need to be applied a bit more widely in the world; we should be a lot less gullible, and require a much higher standard of proof from news organizations, psychology and medical studies, and books mistakenly filed in the non-fiction section, than we do.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 14, 2012

I told you a few days ago about the workshop I attended recently at the Perimeter Institute (PI), which brought a number of particle theorists together with members of the CMS experiment, one of the two general purpose experiments operating at the Large Hadron Collider [LHC]. I described the four main areas of discussion, and mentioned a fifth issue that underlies them all: triggering. Today I’m going to explain to you one of two big advances in triggering at CMS that have recently been made public, the one called “Data Parking”. And I’ll also describe my small role in Data Parking over the last ten months, which will explain, in retrospect, some of the other articles that have appeared on this site during that period.

[This article is almost entirely about CMS, but CMS’s competitor, ATLAS, has also made public that they have something essentially identical (I think!) to Data Parking, which they call “Delayed Data Streaming”.]

Click here to read the rest of this article.

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 13, 2012

The promised follow-up article on the workshop last week in Waterloo, Canada will have to wait til Monday; I had too many scientific activities and chores to take care of today, and I want to make sure the article, which is a bit complicated, is nevertheless clear.   But in the meantime, let’s celebrate Martian Curiosity!

First, a big congratulations to the NASA folks!  Very impressive, and fantastically cool.  I was a huge fan of the Spirit and Opportunity rovers, especially of their 3D photography.  Looking at those photos on a big screen, through red/green 3D glasses. brought me to sweeping Martian vistas and deep Martian craters — as vivid and as close as I’ll ever see them.  It was amazing stuff, and I look forward to more from the new rover.

Next: some perspective. (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 10, 2012

A pause from the usual stuff for a necessary reminder: please keep the comments of a non-personal nature. Talk about the science; if someone makes a mistake, say so, but don’t attack their personalities and intelligence. While I was away from the computer there were a number of comments that turned very nasty toward an individual, and I don’t want that happening here. I did some editing of the worst stuff, but I’d much rather not have to.  Yes, I know some very nasty personal things about me have been said in past comments; but while you’re free to defend me when that happens, please don’t say anything offensive about someone else.

The relevant comments, however, did have some content, which I’ve tried to leave in place.  They were relating to the Milner $,$$$,$$$ prizes (here’s the NY Times article.)  Once-respected Nature News, whose reputation is in precipitous decline within high-energy physics, did a story on the Milner prize in which the only people quoted (other than awardees saying “ooh” and “aah”) were Milner himself and blogger Peter Woit. No matter what you think of the prize [and I have my own serious concerns], it is shocking that an article in Nature on this subject does not quote a single scientist, within or outside the field, whether for or against the prize. I’ve asked for an explanation. Have scientists become invisible? Do we have no rights to express our own opinions anymore?  Are we destined to have our fates and research determined by former science students who haven’t been in the field for decades but have become extremely wealthy and/or extremely vocal?  Hello?  Is anyone sensible still out there? (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 9, 2012

In the field of particle physics, the word “workshop” has a rather broad usage; some workshops are just conferences with a little bit of time for discussion or some other additional feature.  But some workshops are about WORK…. typically morning-til-night work.  This includes the one I just attended at the Perimeter Institute (PI) in Waterloo, Canada, which brought particle experimentalists from the CMS experiment (one of the two general-purpose experiments at the Large Hadron Collider [LHC] — the other being ATLAS) together with some particle theorists like myself.  In fact, it was one of the most productive workshops I’ve ever participated in.

The workshop was organized by the PI’s young theoretical particle physics professors, Philip Schuster and Natalia Toro, along with CMS’s current spokesman Joseph Incandela and physics coordinator Greg Landsberg. (Incandela, professor at the University of California at Santa Barbara, is now famous for giving CMS’s talk July 4th announcing the observation of a Higgs-like particle; ATLAS’s talk was given by Fabiola Gianotti. Landsberg is a senior professor at Brown University.) Other participants included many of the current “conveners” from CMS — typically very experienced and skilled people who’ve been selected to help supervise segments of the research program — and a couple of dozen LHC theorists, mostly under the age of 40, who are experienced in communicating with LHC experimenters about their measurements.  (more…)

Picture of POSTED BY Matt Strassler

POSTED BY Matt Strassler

ON August 7, 2012

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