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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 26,113
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 64,371
For N=1 SUSY, the SUSY algebra is closed as long as Bianchi identity \epsilon^{\mu\nu\rho\sigma}D_\nu...
Aug15-13 02:44 PM
fzero
4 1,410
In his review talk at loops 13 entitled "Loop Quantum Cosmology: A Eulogy" Martin Bojowald has declared that loop...
Aug21-13 02:14 AM
mitchell porter
29 5,893
As I understand, complementarity approach claims that there are 2 different stories, for an infalling observer and an...
Aug21-13 03:13 AM
Dmitry67
6 1,035
In post #549 here I answered: And then I was surprised by the comment of Tom, asking how the pairing was done....
Aug21-13 03:32 AM
mitchell porter
208 80,237
Hi all, I was thinking about the Holographic Universe theory today and wondered... ...If the universe was a...
Aug22-13 11:34 AM
ibzy
2 1,194
This thread is in part belated appreciation of J.S.Engle's seemingly orderly systematic way of doing research, and...
Aug23-13 12:13 AM
marcus
0 873
... due to whatever. What has the effort provided besides showing that the universe doesn't work a certain way?...
Aug23-13 05:52 AM
Beer w/Straw
14 2,078
hi quantum gravity has many problems, I find up to now. I think this problems are conceptual and mathematical is it...
Aug24-13 04:41 AM
QGravity
1 1,303
This was just posted http://arxiv.org/abs/1308.2206 Energetic Causal Sets Marina Cortęs, Lee Smolin (Submitted...
Aug24-13 06:57 PM
audioloop
17 3,587
I may have poorly titled this post, since the lecture I'm talking about isn't just about tachyons, really. What I'm...
Aug26-13 06:05 AM
trimok
1 1,200
This seems to be the most interesting development in QG currently. I want to know what you think might present serious...
Aug26-13 07:44 PM
marcus
19 2,905
In the context of the recent Fuzz or Fire workshop, http://online.kitp.ucsb.edu/online/fuzzorfire_m13/ I would...
Aug26-13 07:53 PM
atyy
3 998
Black holes have an entropy, but they evaporate. At the end of the evaporation, the entropy is greater than the...
Aug27-13 12:40 AM
Chronos
5 1,227
Hi all, What is the Hamiltonian or main equation, that if you solve it, parallel universes are predicted? For...
Aug27-13 09:42 PM
julian
6 1,674
Why string field theory doesn't explane a black singularity but its called the theory of everything? It just...
Aug29-13 02:24 AM
SteamKing
5 1,289
Are the strings in M-Theory impermanent, do they decay for example?(I am not a physicist, curious from a philosophical...
Aug30-13 02:20 PM
WillyB
4 1,207
Hi all, This is an entirely new question, separate from the post I just asked. I am just learning about parallel...
Aug31-13 11:25 PM
MathematicalPhysicist
9 1,938
Chris Duston's talk on this starts at minute 43 of this video: http://pirsa.org/13070085 If you download the slides...
Sep2-13 05:42 PM
marcus
8 1,449
"Gauge" is normally understood as "mathematically redundant" Why are gauge theories so prevalent? Why do they...
Sep3-13 07:57 PM
arivero
65 13,033
We have had several threads that discuss the 2009 prediction of the Higgs boson mass by Shaposhnikov and Wetterich,...
Sep4-13 04:37 AM
mitchell porter
1 1,780
Hey everybody, I have a few questions about membranes in string theory, so here it goes. What is meant by the membrane...
Sep10-13 08:23 PM
Chronos
1 1,059
Hi, sorry for the quite long text. Thanks in advance for any help! I am a little confused about the different...
Sep10-13 08:50 PM
Physics Monkey
6 1,830
Hi, I don't know any physics, but I wondered if I could get a physicist to indulge me by telling me the most obvious...
Sep16-13 08:33 PM
julian
8 1,703
This was just posted on arxiv. It seems to be of general interest so here's a thread in case anyone wants to discuss...
Sep18-13 04:11 PM
marcus
17 3,311
Bee Hossenfelder has proposed a new approach to QG phenomenology, involving new ways to look for signs that space-time...
Sep19-13 01:49 AM
Paulibus
22 4,983
Hello, Can anybody please explain what is super symmetry and what is special unitary group? I read Wikipedia but...
Sep19-13 05:57 AM
shounakbhatta
2 1,129
If it's okay to post this, here's a video about string theory. You can't really learn any physics from it, but it's...
Sep19-13 09:49 AM
Greg Bernhardt
1 1,346
The new geometric version of quantum field theory could also facilitate the search for a theory of quantum gravity...
Sep19-13 03:01 PM
korialstasz
4 1,915
According to string theory there are an extra 7 spatial dimensions curled up at every point in space. They are so...
Sep21-13 09:43 AM
bapowell
2 1,206
Hi, Unfortunately I am not actively involved in physics anymore since high school, but still very interested in the...
Sep23-13 09:04 PM
Trenton
6 2,660
Hi there! S-matrix is Path Integral with Vertex Operators inserted. I know how to compute Shapiro-Virasoro...
Sep24-13 05:47 AM
Korybut
4 2,096
Nice posting by Bee Hossenfelder on her Blog !.. ...
Sep24-13 05:49 PM
atyy
2 1,396
It has be mentioned the real singlet extension of the Standard Model by Chamseddine and Connes. But I favour a pair of...
Sep25-13 02:20 PM
nicoo
4 3,694
Hi, I am looking to find the invariants of products of fields under SU(5) and other possible gauge groups (but lets...
Sep26-13 01:14 PM
fzero
3 2,141
Frank Wilczek and Larry Krauss point out (what is perhaps obvious but nevertheless important) that the universe acts...
Sep26-13 08:29 PM
marcus
4 1,568
I tried to verify that the SYM lagrangian is invariant under SUSY transformation, but it turned out there is a term...
Sep27-13 04:28 PM
Jim Kata
7 3,479
In West's book "Introduction to Strings and Branes", page 2, I don't understand why the auxiliary field e transformed...
Sep29-13 03:20 PM
Korybut
1 1,118
Of the eighteen candidates, please choose the one(s) you think will prove most significant for future research in...
Sep29-13 09:10 PM
marcus
17 4,977
Which do you think are the main quantum geometry (QG) lines recently appearing to rival Loop? Do any look especially...
Sep29-13 10:38 PM
vasudevshyam
9 4,005
The fuss over "firewalls" is basically a challenge to the assumption that watching a black hole form and evaporate,...
Sep30-13 07:41 PM
marcus
42 10,358

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