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Beyond the Standard Model

- Professionally researched theories... strings, branes, & LQG
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Jan16-12 Greg Bernhardt
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Jul14-12 08:32 AM
ZapperZ
1 26,004
announcements, btsm, event Sticky Thread Pinned: BtSM Event Announcements ( 1 2 3 ... Last)
This sticky is for announcements of pertinent scientific events, such as conferences, seminars, or public talks. This...
Jul27-14 12:49 AM
marcus
64 63,868
This might be a noob question, so excuse me if I'm beating a dead horse. I'm trying to wrap my head around string...
Dec28-09 03:56 AM
arivero
2 1,746
Hi all, as last year somehow we missed to announce the ICTP spring school in time. The official deadline was...
Jan26-06 06:37 PM
Stefan Fredenhagen
0 1,747
I know that the physical meaning of SU3 and SU2 - you can change the places of the quarks or/and leptons and you will...
Aug20-11 02:37 AM
lpetrich
2 1,747
Is there a list for all unexpected LHC results from the start of operation that cant be explained by the standard...
Nov29-13 05:55 AM
genneth
14 1,747
In my ST book the world sheet EM tensor for the Polyakov action is given by T_{\alpha \beta} = -\frac{2}{T}...
Apr24-07 07:33 AM
da_willem
5 1,748
We have regular quarterly polls where you pick what you consider the most important research that has come out...
Jun27-12 01:34 PM
marcus
6 1,748
in case anyone is interested Unruh radiation is somewhat like Hawking radiation, a quantum gravity thing----so I will...
Dec16-05 03:57 PM
marcus
8 1,750
In various textbooks like Polchinski and in papers like Witten hep-th/9503124 they go through the process of starting...
May10-06 03:39 AM
AlphaNumeric
4 1,751
‘Deterministic systems’- minimum length – QMLS An understanding of minimum length is not limited to what I have...
Apr25-07 09:00 AM
jal
0 1,751
A recent paper of Jerzy K-G has this footnote on page 7, at the conclusion: "3. Beware! These answers reflect my...
Dec28-06 12:46 PM
marcus
0 1,752
Hello all, I have a wacky idea in a field I don't usually play in, and I would greatly appreciate feedback on it --...
May9-06 11:09 AM
marcus
8 1,753
This paper may be slow to get the attention it merits because of its density and length. I have just printed out...
Jun4-08 10:43 PM
marcus
2 1,754
This confirms a beautiful result of Modesto's earlier paper, that LQG seems to coincide with two other very different...
May12-09 12:50 AM
MTd2
5 1,754
Why does string theory need so many dimensions? i know in our 3 it would break special relativity but i dont know why
Mar15-09 04:44 AM
CompuChip
1 1,755
I recently bought "A First Course in Loop Quantum Gravity" by Pullin and Gambini. Partly, I was curious to see what,...
Aug22-12 08:59 AM
atyy
5 1,756
Can you please tell me some resource or link that has the lagrangian for SO(10) GUT written explicitely term by term?...
Feb8-10 12:02 PM
rkrsnan
1 1,757
http://citebase.eprints.org/cgi-bin/citations?id=oai:arXiv.org:hep-th/0507235 sA predicted that Smolin "The Case...
Sep30-05 11:02 AM
marcus
14 1,758
The Kodama state has been the "If-Only" of post-string Quantum Gravity for several years, since Smolin's 2003 paper...
Nov17-06 01:01 AM
Chronos
6 1,759
That is the question, if you assume the space-time is discrete then it will be an smallest amount of volume line...
Jul4-07 05:39 AM
marcus
5 1,759
I recently moved to a city where the streets are arranged in a grid: they run East-West or North- South. To visit a...
Sep7-09 04:11 AM
qbit
9 1,759
Quantum Gravitation String Theory: Planck's Radius: r_p = \sqrt{ \frac{ \hbar G}{ c^3}} Minimum observable...
Jan4-04 06:18 AM
meteor
1 1,760
A new usenet newsgroup "sci.physics.strings" has been proposed recently. The group shall offer researchers,...
Mar20-04 09:31 PM
Mike2
12 1,760
Carlo Rovelli and Lee Smolin have recently taken diametrically opposed positions on whether time is a basic part of...
Oct16-08 03:43 AM
Demystifier
10 1,760
Daniel Schoch, "Gods as Topological Invariants", arXiv:1203.6902 Abstract: We show that the number of gods in a...
Apr4-12 02:50 AM
tom.stoer
4 1,760
I just read that string theory "started out as a generalization of quantum field theory where instead of point...
Jun19-07 04:51 AM
Demystifier
4 1,762
I was wondering what experiments are planned in the future to verify/fallsify string theory. As I am sure there are...
Nov13-06 09:23 AM
AlphaNumeric
5 1,763
Baez recent paper "Quantum Quandaries" references one that Fotini Markopoulou wrote last year with Hanno Sahlmann and...
Jun23-04 10:41 PM
marcus
4 1,764
For you Marcus: http://www.cbc.ca/technology/story/2008/06/05/lazaridis-perimeter.html
Jun6-08 09:34 PM
shalayka
0 1,764
http://www.perimeterinstitute.ca/activities/scientific/seminarseries/alltalks.cfm?CurrentPage=1&SeminarID=836 ...
Oct19-06 10:29 AM
marcus
0 1,764
Is it just me, or are dimensions supposed to simply add another coordinate, i.e., I can move 1m in x, y or z direction...
Jan22-11 10:33 AM
jal
6 1,764
Specifically what I`m referring to is the final discussion summing up the program in which the weakness of lqg was...
Feb2-07 11:28 AM
rtharbaugh1
7 1,765
Terminology question: Does SBH mean "black hole entropy" or "Bekenstein-Hawking entropy"?
Oct17-11 02:53 AM
Demystifier
2 1,765
So, it goes in the first loop, no problem. In the second loop, no problem either, it could just change the spin. So,...
Feb27-09 04:37 AM
Demystifier
6 1,765
I suspect that the most influential string research will now tend to be done in places where there is a strong...
Oct26-07 04:11 PM
marcus
2 1,766
Hi there, I'm searching for an argument according to which fundamental strings cannot carry RR charge. I'm aware of...
Oct6-08 05:34 AM
lumidek
7 1,766
List of reccomended reading for string theory includes- 'A Proposal About the Rest Masses of Quarks' by Jiao Lin Xu...
May26-04 01:09 AM
elas
2 1,767
In an experiment by Page and Geilker published in Indirect Evidence for Quantum Gravity, two mases that are connected...
Nov16-06 07:04 AM
Demystifier
1 1,767
what means simetry Z2 in brane world?? why in randall sundrum model ds^2 = A(y) dx^udx^v + dy^2 and A(y) =...
Sep17-11 07:07 PM
alejandrito29
0 1,767
Have a look at http://arxiv.org/abs/1202.5039 Degenerate Plebanski Sector and its Spin Foam Quantization Authors:...
Feb27-12 12:55 AM
tom.stoer
6 1,767
http://somethingsimilar.com/mixedstates/ Peter Woit called attention to this. It gathers blog material relating to...
Nov26-05 05:07 PM
jmhodges
1 1,768

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