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Beyond the Standard Model

- Professionally researched theories... strings, branes, & LQG
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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...
Apr12-14 02:54 PM
marcus
59 45,884
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Jul14-12 08:32 AM
ZapperZ
1 22,261
Our major candidates for quantum gravity are as you know String Theory and Loop Quantum Gravity. Loop Quantum...
Mar1-12 06:47 PM
Vanadium 50
8 1,535
just looking at the standard model, which describes a host of fundamental particles and bosons, one could assume that...
Mar1-12 06:45 AM
martinbn
9 1,784
I was watching "The Fabric of the Cosmos: What is Space?" on pbs.com, and I couldn't help but wonder a few things...
Feb27-12 03:55 AM
John232
1 1,594
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 1,639
To people familiar with QFT. You know quantum fields are non-interacting and they use perturbations methods. Is there...
Feb25-12 06:00 PM
waterfall
212 19,356
Is there any theory for which "elementary" particles are "small" black holes or/and for which the electron and the...
Feb25-12 03:13 AM
Blackforest
9 1,970
Remember that the electroweak force couldn't be renormalized for over many decades, until Weinberg and company finally...
Feb24-12 06:10 AM
waterfall
6 1,766
Does any of our quantum gravity theories like String Theory or Loop Quantum Gravity (what else?) answer "why"...
Feb24-12 05:12 AM
david findley
10 2,184
I am currently studying geometry and topology (with applications in physics) from the books T. Frankel "The...
Feb24-12 03:44 AM
Sara Oal
5 3,086
Let's deal with the easier problem. The hard probems being how to solve for M-Theory and how LQG can have exact GR as...
Feb23-12 03:04 AM
mitchell porter
11 2,725
Hi there, I'm wondering about the following: Assume that string theory is more or less correct and that...
Feb22-12 07:49 AM
bapowell
7 1,838
1. the probability of finding any one particular electron on any finite interval in the universe is nonzero....does...
Feb21-12 11:41 PM
dpa
1 1,187
Cai and Easson's paper takes off from the seminal paper of Shaposhnikov and Wetterich that is discussed here at BTSM...
Feb21-12 10:35 PM
marcus
2 1,719
(Forgive the long title of this thread, but I was reminded to be descriptive with the title. Hope that's ok now...) ...
Feb20-12 04:26 PM
friend
6 1,712
Are there any theories as to what could possibly cause/create the vibrating one dimensional strings in string theory?...
Feb20-12 02:10 PM
euquila
6 1,999
Hello, I have been reading quite a bit about Tegmark's mathematical universe hypothesis. I realise that it is overly...
Feb18-12 04:34 AM
czes
2 1,688
Is it possible for LQG to occur in higher dimension (more than 3+1)? If possible. How? If not possible. Do you...
Feb18-12 03:14 AM
waterfall
11 2,237
--I understand that the original basis of string theory was as explanation for the ontological origin quanta . I...
Feb16-12 11:25 PM
mitchell porter
1 1,863
I'm not sure if I'm posting this in the right place, but either way I was doing some research earlier and I came...
Feb16-12 03:53 PM
jtbell
2 1,893
http://arxiv.org/abs/1202.3373 A perspective on the landscape problem Lee Smolin (Submitted on 15 Feb 2012) I...
Feb16-12 09:22 AM
marcus
2 1,877
I am studying Witten's papers on AdS/CFT. But I don't have any CFT or SUSY background. Can anyone suggest me some...
Feb16-12 06:54 AM
haushofer
3 2,032
Several popular-science type news sources are reporting this weekend on an experiment at Fermilab that claims to...
Feb14-12 02:32 AM
czes
8 4,710
When we say that expansion of universe is like that of balloon, are galaxies and other objects are papers pasted on...
Feb14-12 01:43 AM
Pengwuino
1 1,478
I'm new to physics, so I'm sorry if this is a dumb question. If a string cannot be point like, it has measurable...
Feb13-12 09:17 PM
ohwilleke
5 1,879
Reading the February edition of the New Scientist (about space-time being possiblly quantized in its own right) I...
Feb11-12 04:18 PM
geordief
3 1,822
Watched an episode of Brian Greenes NOVA "The Fabric of the Universe" for the 300th time and an episode of "The...
Feb9-12 08:03 AM
James Leighe
2 1,578
Hi all, This is partially motivated by the thread on Ashtekar's new review and by old results on emergent spacetime...
Feb7-12 10:27 PM
Physics Monkey
3 1,560
Abhay Ashtekar has just posted a surehanded insightful survey of the main approaches to QG, focusing on current Loop...
Feb7-12 02:23 PM
marcus
64 6,952
I've heard that particles and the fabric of space can consist of many small strings, but then I heard that things like...
Feb7-12 12:14 PM
DaveC426913
14 2,353
What are the constraints (is this the right word) for introducing new fundamental force? Can our Standard Model...
Feb5-12 07:38 PM
BDOA
35 5,807
Hey, I'm really into this theory about super strings and different demisions. Would anyone know what the super string...
Feb4-12 11:54 PM
mitchell porter
5 5,925
In QM and QFT, imaginary time is used to make the oscillatory path integral converge, and also to handle terms that...
Feb1-12 06:50 PM
atyy
2 1,630
Is it accepted as theoretically possible that there could be an infinity of universes with totally unrelated (or...
Jan31-12 05:55 PM
tom.stoer
2 1,680
In a youtube video Paul Davies Beyond Belief, http://www.youtube.com/watch?v=bwkw39Euc64 he said that string...
Jan31-12 10:15 AM
LBloom
3 2,429
what is difference between A. hubble radius and spatial radius. B.what are Flatness and horizon problems with...
Jan30-12 02:25 PM
bapowell
1 1,450
I am looking for the equations of motion for type IIA superstring theory (just the bosonic section ).
Jan30-12 02:06 PM
hamidsv
0 1,083
I don't get the arbitrary idea of some String Theorists that beyond the 3rd/4th dimensions the others are "small"....
Jan30-12 01:22 PM
cdux
7 1,987
Hi, In SUSY we introduce chiral superfield, vector superfield, then build some invariants and get the SUSY...
Jan30-12 03:45 AM
torquil
1 1,480
In Tom Stoer's latest thread, he says "there is growing evidence that the incompleteness of the different approaches ...
Jan29-12 08:49 PM
atyy
12 2,331
why is reality described by 11 dimensions and strings? why is the most fundamental thing a string and not a very small...
Jan29-12 10:01 AM
maxverywell
1 1,482

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