LHC


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Re: LHC

Postby lonewolf » Sun Sep 30, 2012 2:46 pm

And you get away with that?? :)
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Re: LHC

Postby Daisy » Sun Sep 30, 2012 4:25 pm

lonewolf wrote:And you get away with that?? :)

Wouldn't you like to hear the kids in the halls after his class? :)
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Re: LHC

Postby Marlow » Sun Sep 30, 2012 4:46 pm

Daisy wrote:
lonewolf wrote:And you get away with that?? :)

Wouldn't you like to hear the kids in the halls after his class? :)

a. is it not intuitively obvious that I can't possibly KNOW any of that?
b. when I see their parents after that, they inevitably say it was the dinner conversation for several days and they (the parents) think it's wonderful that someone is finally challenging them in that sort of way.
c. no student ends up believing me, lock-stock-and-barrel, but the inevitable outcome is that that start thinking about these sorts of things, instead of just locksteppingly accepting everything they had been taught heretofore.
d. we finally come to the conclusion that my story is as feasible as any other. :D
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Re: LHC

Postby JRM » Sun Sep 30, 2012 6:13 pm

Marlow wrote:d. we finally come to the conclusion that my story is as feasible as any other. :D


Well, some may believe that... ;)
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Re: LHC

Postby lonewolf » Sun Sep 30, 2012 8:47 pm

I suppose anything someone doesn't understand is feasible. :)
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Re: LHC

Postby Marlow » Mon Oct 01, 2012 2:49 am

lonewolf wrote:I suppose anything someone doesn't understand is feasible. :)

And since no one can prove my story wrong, I'm good to go!
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Re: LHC

Postby Pego » Mon Oct 01, 2012 4:58 am

Marlow wrote:
lonewolf wrote:I suppose anything someone doesn't understand is feasible. :)

And since no one can prove my story wrong, I'm good to go!


Ain't the metaphysics grand? Anything goes :wink: .
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Re: LHC

Postby Marlow » Mon Oct 01, 2012 6:05 am

Pego wrote:Ain't the metaphysics grand? Anything goes :wink: .

Yes, and my story is literally based on META-physics: how the (changes in) physics of the multiverse works!
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Re: LHC

Postby JRM » Mon Oct 01, 2012 8:20 am

Marlow wrote:
lonewolf wrote:I suppose anything someone doesn't understand is feasible. :)

And since no one can prove my story wrong, I'm good to go!


No one, huh? Hmm..
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Re: LHC

Postby Marlow » Mon Oct 01, 2012 8:39 am

JRM wrote:No one, huh? Hmm..

Anyone can come up with a similarly constructed 'story', but no, no one can PROVE or DISPROVE the story unless there are impossibilities (as we currently define the physics of OUR universe) that render the story untenable.

I would LOVE to hear your version of the story!! (seriously). What I don't like are students who just give up and say, 'I have no idea'. Where's the adventure in that?!
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Re: LHC

Postby 26mi235 » Tue Oct 02, 2012 8:53 pm

dukehjsteve wrote:3 "big picture ??'s from me:

1. We say the universe began with a "big bang". How do we know there have not been an infinite # of big bangs previously, with another infinity of them to come in the future, before and after the birth and demise of our current deal ?

2. What is currently the farthest object ( star/galaxy ) that we have seen telescopically ?

3. We speak of the "expanding" universe." If this is so, and the other sides, how do we know there are not an infinite # of additional universes ?

My head is spinning now, I'll stop.


This is JRM territory, I am an amateur and working without notes (and no looking at Wiki...) Generally, they call it space-time for a reason: the two are completely intertwined. 'Before' the Big Bang there was no time and no space. A corollary is that time will end if the universe collapses back to a point. However, everything at this point indicates that we ain't ever going back. Rather, the expansion is speeding up as Dark Energy is over-coming the retarding effects of gravity. There are alternative theories that have little bit extra that changes such things but are not views that are widely held, I think. JRM has interactions with some of these guys.

I must go now, will add more later if JRM has not covered the territory.
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Re: LHC

Postby Pego » Wed Oct 03, 2012 4:15 am

Marlow wrote:What I don't like are students who just give up and say, 'I have no idea'. Where's the adventure in that?!


Do you really prefer speculation unsupported by evidence to admission of ignorance of the subject matter? A flight of fancy over facts?
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Re: LHC

Postby Marlow » Wed Oct 03, 2012 4:49 am

Pego wrote:Do you really prefer speculation unsupported by evidence to admission of ignorance of the subject matter? A flight of fancy over facts?

One of the explicit goals of my class IS to speculate, especially where the facts are insufficient to 'know'. When they speculate (or I do, which is often), we find ways to support or refute the supposition. They will be presented with MANY unsubstantiated ideas throughout their lives and it's my job to prepare them for that - to question everything. Speculation is the human way of "making meaning" out of the randomness of our existence. Existential exercises such as this are paramount in their 'college-prep' experience, college being where 'speculation' is the coin of the realm, at least in the humanities.
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Re: LHC

Postby Daisy » Wed Oct 03, 2012 6:01 am

Marlow wrote:Existential exercises such as this are paramount in their 'college-prep' experience, college being where 'speculation' is the coin of the realm, at least in the humanities.

But this is science, not humanities. The norm in science is to gather information so the first 'speculation' can be informed rather than a guess.
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Re: LHC

Postby Marlow » Wed Oct 03, 2012 7:43 am

Daisy wrote:But this is science, not humanities.

Not really. As Pego points out, it's metaphysics. Nothing I posit goes AGAINST science as we understand it (not that it's remotely 'true' in any real sense).
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Re: LHC

Postby Pego » Wed Oct 03, 2012 8:52 am

Marlow wrote:
Daisy wrote:But this is science, not humanities.

Not really. As Pego points out, it's metaphysics. Nothing I posit goes AGAINST science as we understand it (not that it's remotely 'true' in any real sense).


Hey, let's not misquote Pego. I referred to your monologue on universe as metaphysics. A subject matter in question was universe, i.e. science. Your exercises in mental gymnastics with your students are fine as long as it remains just that, mental exercises, not mistaking fantasy for reality.
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Re: LHC

Postby Marlow » Wed Oct 03, 2012 9:42 am

Pego wrote:Your exercises in mental gymnastics with your students are fine as long as it remains just that, mental exercises, not mistaking fantasy for reality.

As I said before, this is an ENGLISH class, not an astrophysics seminar.
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Re: LHC

Postby tandfman » Wed Oct 03, 2012 1:05 pm

It's hard for me to see what that has to do with the study of the English language or its literature.
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Re: LHC

Postby Daisy » Wed Oct 03, 2012 1:09 pm

Fantasy, Fiction and Sci-Fi are terms that spring to mind ;)
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Re: LHC

Postby tandfman » Wed Oct 03, 2012 2:20 pm

Well yes, but the paragraph that Marlow reads to them doesn't seem to fit any of those categories.
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Re: LHC

Postby Marlow » Wed Oct 03, 2012 3:40 pm

tandfman wrote:Well yes, but the paragraph that Marlow reads to them doesn't seem to fit any of those categories.

It has little (if nothing) to do with the subject matter. Did you read my explanation above? (not that ya hafta!)
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Re: LHC

Postby tandfman » Wed Oct 03, 2012 4:48 pm

Yes, but you're the one who stressed that this was an ENGLISH class.
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Re: LHC

Postby Marlow » Wed Oct 03, 2012 5:02 pm

tandfman wrote:Yes, but you're the one who stressed that this was an ENGLISH class.

It is. I was demonstrating an important facet of rhetoric (of which speculation often plays an important part). The AP English Language course is primarily one of rhetorical analysis. The discussion that my 'lecture' engenders gives valuable insight into how one should handle the vagaries of the information that are thrown at us on a daily basis.
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Re: LHC

Postby JRM » Fri Oct 05, 2012 2:06 pm

Here's a link to the journal issue (Physics Letters B) in which the official discovery announcement papers from the ATLAS and CMS Collaborations are published (p 1-29 for ATLAS, and p 30-61 for CMS). Also, scroll down and check out paper #11 in the issue's Astrophysics and Cosmology section (p 171-176)!

http://www.sciencedirect.com/science/jo ... 2693/716/1
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Re: LHC

Postby Pego » Fri Oct 05, 2012 2:55 pm

JRM wrote:Here's a link to the journal issue (Physics Letters B) in which the official discovery announcement papers from the ATLAS and CMS Collaborations are published (p 1-29 for ATLAS, and p 30-61 for CMS). Also, scroll down and check out paper #11 in the issue's Astrophysics and Cosmology section (p 171-176)!

http://www.sciencedirect.com/science/jo ... 2693/716/1


It would be even better if I understood it :) .
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Re: LHC

Postby bambam » Sat Oct 06, 2012 5:18 am

I think JRM is referring to #11 as his own paper - author is JR Mureika.
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Re: LHC

Postby Pego » Sat Oct 06, 2012 6:40 am

bambam wrote:I think JRM is referring to #11 as his own paper - author is JR Mureika.


Yes.
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Re: LHC

Postby 26mi235 » Sat Oct 06, 2012 10:27 pm

JRM wrote:Here's a link to the journal issue (Physics Letters B) in which the official discovery announcement papers from the ATLAS and CMS Collaborations are published (p 1-29 for ATLAS, and p 30-61 for CMS). Also, scroll down and check out paper #11 in the issue's Astrophysics and Cosmology section (p 171-176)!

http://www.sciencedirect.com/science/jo ... 2693/716/1


By the way. look at the length of the authors list; the 19th author has a name starting with Ad and they are all alphabetical.
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Re: LHC

Postby JRM » Sun Oct 07, 2012 7:39 pm

26mi235 wrote:
JRM wrote:Here's a link to the journal issue (Physics Letters B) in which the official discovery announcement papers from the ATLAS and CMS Collaborations are published (p 1-29 for ATLAS, and p 30-61 for CMS). Also, scroll down and check out paper #11 in the issue's Astrophysics and Cosmology section (p 171-176)!

http://www.sciencedirect.com/science/jo ... 2693/716/1


By the way. look at the length of the authors list; the 19th author has a name starting with Ad and they are all alphabetical.



It's also not uncommon for those international collaborations to have authors who are posthumously listed (and I believe there are several in that list). In fact, the entire author listing goes on for at least 10 pages.
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Re: LHC

Postby Marlow » Mon Oct 08, 2012 2:46 am

JRM wrote:In fact, the entire author listing goes on for at least 10 pages.

Publish or perish!
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Re: LHC

Postby tandfman » Mon Oct 08, 2012 4:49 am

JRM wrote: In fact, the entire author listing goes on for at least 10 pages.

Sounds like movie credits. :)
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Re: LHC

Postby JRM » Mon Oct 08, 2012 6:34 am

tandfman wrote:
JRM wrote: In fact, the entire author listing goes on for at least 10 pages.

Sounds like movie credits. :)


Here what the ATLAS paper look like:

http://arxiv.org/pdf/1207.7214

The author list starts at page 25. The paper also has the following dedication:

"This paper is dedicated to the memory of our ATLAS colleagues who did not live to see the full impact and significance of their contributions to the experiment."
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Re: LHC

Postby 26mi235 » Mon Oct 08, 2012 4:08 pm

JRM wrote:
26mi235 wrote:
JRM wrote:Here's a link to the journal issue (Physics Letters B) in which the official discovery announcement papers from the ATLAS and CMS Collaborations are published (p 1-29 for ATLAS, and p 30-61 for CMS). Also, scroll down and check out paper #11 in the issue's Astrophysics and Cosmology section (p 171-176)!

http://www.sciencedirect.com/science/jo ... 2693/716/1


By the way. look at the length of the authors list; the 19th author has a name starting with Ad and they are all alphabetical.



It's also not uncommon for those international collaborations to have authors who are posthumously listed (and I believe there are several in that list). In fact, the entire author listing goes on for at least 10 pages.


My article in Nature had ten authors, and I thought that that was a lot. Yes, I am aware of the issues in big experimental setups, so I am not surprised by that long list.
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Re: LHC

Postby 26mi235 » Mon Nov 12, 2012 6:59 am

Results not kind to Super Symmetry. Commentary from JRM needed here for perspective?

The new observation, reported at the Hadron Collider Physics conference in Kyoto, is not consistent with many of the most likely models of SUSY.

Prof Chris Parke, who is the spokesperson for the UK Participation in the LHCb experiment, told BBC News: "Supersymmetry may not be dead but these latest results have certainly put it into hospital."

http://www.bbc.co.uk/news/science-environment-20300100
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Re: LHC

Postby JRM » Wed Nov 14, 2012 9:38 am

26mi235 wrote:Results not kind to Super Symmetry. Commentary from JRM needed here for perspective?

The new observation, reported at the Hadron Collider Physics conference in Kyoto, is not consistent with many of the most likely models of SUSY.



Their results suggest that the decays of B0-mesons (neutral particles made of quark - anti-quark pairs of varying flavor) decay to lighter particles (muon and anti-muon) in a fashion consistent with the Standard Model. The bad thing is the statistics of the decay rates (called branching ratios) is what strongly constraints Supersymmetry. That is, supersymmetry predicts a rate they're decidedly not seeing. So, good for Standard Model, bad for Supersymmetry.

That being said, my contacts at CERN inform me that LHCb is stretching the stats a bit, and not to put too much faith in the "sensationalist" press release.
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Re: LHC

Postby Marlow » Wed Nov 14, 2012 11:37 am

JRM wrote:(neutral particles made of quark - anti-quark pairs of varying flavor) decay to lighter particles (muon and anti-muon)

So I'm reading wiki . . .

There is considerable speculation as to why the observable universe is apparently composed almost entirely of matter (as opposed to a mixture of matter and antimatter), whether there exist other places that are almost entirely composed of antimatter . . .

I'm imagining an anti-universe where left is right, down is up . . . :wink:
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Re: LHC

Postby JRM » Wed Nov 14, 2012 1:49 pm

Marlow wrote:
There is considerable speculation as to why the observable universe is apparently composed almost entirely of matter (as opposed to a mixture of matter and antimatter), whether there exist other places that are almost entirely composed of antimatter . . .

I'm imagining an anti-universe where left is right, down is up . . . :wink:


Well, yes and no. Anti-matter does exist in our region of the universe. In fact, high-energy cosmic ray positrons (i.e. anti-electrons) shoot through your body every day. We can also readily manufacture anti-matter in the laboratory, e.g. at CERN. Anti-particles have the opposite properties of their particle counterparts, but those are PARTICLE properties: the two most common are spin and chirality (so, in a sense, right IS left for anti-matter).

But technically, mass is not included: anti-matter has positive mass, and feels gravity the same way normal mass does. Now, in other cases, you can have negative energy particles, but those can't exist for more time than the Heisenberg Uncertainty Principle allows (i.e. they're not around long enough for you to see them).

If you want to go full-weird, however, you can adopt Richard Feynman's interpretation of anti-particles: they are negative-energy (negative mass) particles that travel backward in time!
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Re: LHC

Postby Marlow » Wed Nov 14, 2012 4:11 pm

JRM wrote:1. high-energy cosmic ray positrons (i.e. anti-electrons) shoot through your body every day.
2. they're not around long enough for you to see them.
3. anti-particles: they are negative-energy (negative mass) particles that travel backward in time!

1. I wondered what that tingling sensation was!
2. um . . . then how do we know . . . never mind
3. What happens when they get back to the Big Bang?! :shock:
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Re: LHC

Postby 26mi235 » Wed Nov 14, 2012 6:19 pm

[quote="Marlow"
3. What happens when they get back to the Big Bang?! :shock:[/quote]

Given what 'Dark Energy' does, it seems like there will be no return to the Big Bang in the future (it is never coming back together in a point), if that is what you meant.

If you meant what it looks like when you look back far enough, there is no really looking back passed about 300,000 from BB because the radiation was dominant and it was all a haze.
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Re: LHC

Postby Marlow » Wed Nov 28, 2012 3:29 pm

Oh dear!

yahoo news wrote:Collisions between particles inside the Large Hadron Collider atom smasher have created what looks like a new form of matter. The new kind of matter is called color-glass condensate, and is a liquidlike wave of gluons, which are elementary particles related to the strong force that sticks quarks together inside protons and neutrons (hence they are like "glue").
In this case, the collisions create what's called quark-gluon plasma — a superhot soup of particles similar to the state of the universe just after the Big Bang.


We're messin' wid stuff we might shouldn't! :wink:
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