
This sticky is for announcements of pertinent scientific events, such as conferences, seminars, or public talks. This...

Y 11:17 AM
marcus

68 
66,537 
Before posting anything, please review the Physics Forums Global Guidelines.
If you are seeking help with a...

Jul1412 08:32 AM
ZapperZ

1 
26,577 
We currently have a thread about logarithmic corrections to the basic black hole entropy formula. I was thinking about...

May1012 11:42 AM
marcus

9 
2,994 
Ashoke Sen has written a paper
http://arxiv.org/abs/1205.0971
which uses path integrals in Euclidean gravity to...

May912 07:47 PM
MTd2

23 
4,119 
Just got this issue (also linked to from PF home page):
...

May812 06:09 AM
muinon

15 
4,443 
And is a black hole where strings stop vibrating? Like one membrane deadening the vibrations resonating from another...

May712 08:22 PM
Caracoid

0 
3,090 
I was recently reading a small news article named Experiments Show Gravity Is Not an Emergent Phenomenon.
Linky.
...

May412 06:09 PM
Sigurdsson

3 
1,748 
Has anyone read Sach's textbooks and papers?
What is incosistent in his approach, as far as I can tell there's...

Apr3012 09:17 PM
trango

27 
9,074 
Can anyone give me a general sense of what the quantum master equation (or BV master equation) is and how it relates...

Apr2912 07:04 PM
fzero

4 
2,763 
I know that cosmic string have intense energy and are apparently leftovers from the big bang and can create a sort of...

Apr2712 05:12 PM
mwalmasri

1 
1,959 
Tom's thread "Why I'm REALLY disappointed..." continues to get increasingly thoughtprovoking and informative. I...

Apr2712 01:10 PM
marcus

357 
56,127 
Hello,
I am an amateur physics enthusiast and would like to pose a question to you.
It is my understanding that...

Apr2612 04:35 PM
mfb

1 
2,309 
What are the charges of the X and Y boson?
I've been looking through online material, and most doesn't mention...

Apr2512 07:47 AM
lpetrich

10 
2,593 
I would like to discuss a puzzle I'm wondering about in loopy approaches to quantum gravity.
The puzzle is roughly...

Apr2512 02:38 AM
Demystifier

60 
12,618 
I have read in a couple different places that the math that comes out of string theory has helped a couple of...

Apr2412 07:41 PM
redrum419_7

6 
2,299 
There is a natural way to formulate Loop quantum geometry as the dynamics of line defects in a flat vacuum. Just under...

Apr2312 09:10 AM
marcus

3 
1,967 
The appearance here of threads such as Causes of loss of interest in the String program and Is string theory really...

Apr2312 03:48 AM
Paulibus

2 
2,111 
http://pirsa.org/12040059
Fine presentation today, room packed, good questions from audience (esp. from Turok but...

Apr2112 06:10 PM
marcus

49 
8,828 
Please teach me this:
We know that there is a approximate symmetry of time T in physics(together with CP...

Apr1912 09:15 AM
ndung200790

3 
1,659 
Einstein's General Realitivity acurately computed the precession of the perihelion of the Mercury, Schwinger's and...

Apr1912 07:03 AM
Berlin

6 
2,156 
Hello all,
I am currently a Junior in High School with a deep interest in Physics/Mathematics, specifically in the...

Apr1812 10:28 AM
bapowell

4 
2,412 
My understanding is that Fermi has results that show the mixing angle for neutrinos is not the same as the mixing...

Apr1812 02:51 AM
DrBenStill

1 
2,035 
The scientific method says that if experiments or observations falsify a theory, that theory must be rejected.
String...

Apr1612 04:21 PM
RoshanBBQ

34 
9,726 
Hi,
In Birrel and Davies ch4 they write:
\langle \psi:T_{ab}:\psi \rangle =\langle \psiT_{ab}\psi \rangle...

Apr1412 11:45 AM
LAHLH

2 
2,103 
what is the the easiest way to learn standard model theory ?

Apr1412 08:57 AM
bapowell

8 
2,778 
In LQG the canonical variables are a SU(2) connection A, and the "electric" field E, such that they form a canonical...

Apr1212 05:44 PM
zwicky

4 
2,005 
Hi Everyone,
:shy:
I read in some paper about the significance of GravitonGraviton Scattering as a theoretical tool...

Apr1012 01:31 AM
dpa

2 
1,735 
which particles or phenomena in High energy physics make us needs Noncommutative Solitons in String Theory?

Apr912 01:49 PM
mwalmasri

0 
1,247 
==sample quote==
It is especially wrong to talk about a mysterious “substance” to denote dark energy. The expression...

Apr912 12:32 PM
marcus

123 
28,119 
Suppose we can meld quarks into leptons and leptons into quarks vice versa. Consider the particles to all be the same,...

Apr812 08:30 PM
KyleStreet

0 
1,494 
how the decay of proton emerge from GUT Modles, did the group SO(10) contains gravity, or only the strong, weak and...

Apr812 05:47 PM
mwalmasri

0 
1,306 
Well, not new insights, but at least new paper and a new face:
http://arxiv.org/abs/1204.0328 Particle Physics from...

Apr712 08:45 AM
arivero

4 
2,074 
Which and why do you believe will turn out to be more 'fundamental' (in the sense that one will prove to be the...

Apr612 02:15 AM
Demystifier

3 
1,754 
Which talks' input will contribute most to future research in Loopandallied quantum gravity?
Since the poll is...

Apr512 09:32 PM
marcus

13 
3,205 
Carlip has argued that the dimensional reduction in many apprroaches to quantum gravity is related to the BKL limit...

Apr512 05:00 PM
marcus

2 
2,185 
i need what we mean by BL extension of the Standard Model ?

Apr512 01:51 PM
arivero

1 
1,168 
Hi all,
:shy:
Could anyone explain in very simple language, for lower UGrad standard, what spin foams and spin...

Apr412 02:29 PM
marcus

19 
3,794 
I am confused about what area is being minimised in the nambu goto action..the one in the target space or the one in...

Apr412 10:17 AM
tom.stoer

2 
1,703 
It is supposed that the smallest posible black hole (BH) has mass of Planck's mass.
But obviously one nucleon (or...

Apr412 08:22 AM
mfb

8 
2,261 
Daniel Schoch, "Gods as Topological Invariants",
arXiv:1203.6902
Abstract: We show that the number of gods in a...

Apr412 02:50 AM
tom.stoer

4 
1,785 
Please teach me this:
Does ''Higgs sector'' mean there are many Higgs particle types?Does custodial SU(2) symmetry...

Apr312 11:19 AM
mfb

4 
3,810 
http://lanl.arxiv.org/abs/1203.5719
Abstract:
We study a selfconsistent solution of the semiclassical Einstein...

Apr212 10:41 AM
Demystifier

9 
2,469 