a****a
发帖数: 5763 | 1 【 以下文字转载自 Physics 讨论区 】
发信人: acidia (acidia), 信区: Physics
标 题: BREAKING NEWS: Error Undoes Faster-Than-Light Neutrino Resu
发信站: BBS 未名空间站 (Wed Feb 22 21:17:31 2012, 美东)
http://news.sciencemag.org/scienceinsider/2012/02/breaking-news
t appears that the faster-than-light neutrino results, announced last
September by the OPERA collaboration in Italy, was due to a mistake after
all. A bad connection between a GPS unit and a computer may be to blame.
Physicists had detected neutrinos travelling from... 阅读全帖 |
|
a****a
发帖数: 5763 | 2 http://news.sciencemag.org/scienceinsider/2012/02/breaking-news
t appears that the faster-than-light neutrino results, announced last
September by the OPERA collaboration in Italy, was due to a mistake after
all. A bad connection between a GPS unit and a computer may be to blame.
Physicists had detected neutrinos travelling from the CERN laboratory in
Geneva to the Gran Sasso laboratory near L'Aquila that appeared to make the
trip in about 60 nanoseconds less than light speed. Many other physici... 阅读全帖 |
|
s******o
发帖数: 298 | 3 The heart of the Sudbury Neutrino Observatory is an acrylic sphere filled
with heavy water and surrounded by photomultiplier tubes. These detect flashes
of light produced when neutrinos interact with the water. This fisheye view
was taken from beneath the sphere before the bottom panel of detectors was
installed. Courtesy Ernest Orlando, Lawrence Berkeley National Laboratory.
By Govert Schilling
April 22, 2002 | Neutrinos have mass, they change identity when passing
through matter, and the Stand |
|
|
s******o
发帖数: 298 | 5 【 以下文字转载自 Astronomy 讨论区 】
【 原文由 Staccato 所发表 】
The heart of the Sudbury Neutrino Observatory is an acrylic sphere filled
with heavy water and surrounded by photomultiplier tubes. These detect flashes
of light produced when neutrinos interact with the water. This fisheye view
was taken from beneath the sphere before the bottom panel of detectors was
installed. Courtesy Ernest Orlando, Lawrence Berkeley National Laboratory.
By Govert Schilling
April 22, 2002 | Neutrinos have mass, they change iden |
|
s******o
发帖数: 298 | 6 The heart of the Sudbury Neutrino Observatory is an acrylic sphere filled
with heavy water and surrounded by photomultiplier tubes. These detect flashes
of light produced when neutrinos interact with the water. This fisheye view
was taken from beneath the sphere before the bottom panel of detectors was
installed. Courtesy Ernest Orlando, Lawrence Berkeley National Laboratory.
By Govert Schilling
April 22, 2002 | Neutrinos have mass, they change identity when passing
through matter, and the Stand |
|
p******e
发帖数: 58 | 7 Anyone has some inside information about the recent result
on K2K long baseline neutrino Oscillation Experiment?
I heard some rumer that they have significant lower rate
than expected, is it true? This should be very important
results.
For people at/near Caltech,
there will be a special seminar at 2pm today in 248 Lauritsen.
Makoto Sakuda of KEK, Japan will present the preliminary results
from K2K long baseline neutrino Oscillation Experiment.
If I were there, I would definitely go. Anyone cou |
|
L******f
发帖数: 5368 | 8 美国Main Injector Neutrino Oscillation Search (MINOS)
曾经在2007年观测到中微子超光速。当时实验精度较低。
现在MINOS发言人Jenny Thomas宣布MINOS将在更高精度
重复中微子超光速实验。
夸克，电子，μ子，τ子都带电荷。惟有中微子不带电。
有可能打破相对论的唯一候选人就是中微子。
换言之，本狼预言μ子，τ子将和质子，中子，电子一样，
将符合相对论，不可能超光速。
Go，MINOS!
哈哈，言过其实了，引力子也不带电。也可能打破相对论。
不过，引力子到现在还没现身，不能指望它了。 |
|
b**k
发帖数: 3472 | 9 China Builds Mammoth Detector to Probe Mysteries of Neutrino Mass
Jane Qiu*
View larger version:
In this pageIn a new window
Download PowerPoint Slide for Teaching
Heavy hitter. China hopes its planned JUNO detector, 38 meters across, will
be the first to nail which of the three neutrino flavors is heavier or
lighter.
CREDITS: (INSET) IHEP; (SOURCE) M. BLENNOW ET AL. ARXIV 1311.1822 (2013)
BEIJING—It isn't easy to weigh a ghost. After neutrinos were hypothesized
in 1930, it took physicists 67 ye... 阅读全帖 |
|
n********k
发帖数: 2818 | 10 I was wondering what percent of CNS papers could withstand the similar
scrutinization....
Once Again, Physicists Debunk Faster-Than-Light Neutrinos
by Adrian Cho on 8 June 2012, 3:39 PM | 10 Comments
Share on email Email Share on print Print | Share on facebook Share on
google_plusone
Share on reddit Share on stumbleupon More Sharing Services More
Previous Article
Enough already. Five different teams of physicists have now independently
verified that elusive subatomic particles called neutrinos ... 阅读全帖 |
|
l**********1
发帖数: 5204 | 11 2020年前 物理学炸药奖给大亚湾小组的组长的话 实验高能物理这一块就是崛起于世界位于Top Level了。
today's chinese version:
中国发现新的中微子振荡 韩媒惊呼诺奖受冲击
新闻来源: 人民网 于March 13, 2012
//www.6park.com/news/messages/66140.html
----
and March 8 2012 news:
from UC BERKELEY
New discovery is key to understanding neutrino transformations
By Robert Sanders, Media Relations | March 8, 2012
BERKELEY —
A new discovery provides a crucial key to understanding how neutrinos – ghostly particles with multiple
personalities – change identity and may help shed light... 阅读全帖 |
|
b***y
发帖数: 14281 | 12 既然有人争论方的学术水平，就上网搜了一下。应该说这个水平对于一个junior
faculty来说可以算是很牛B了，但是对于老方这种senior的已经搞了一辈子的人来说，
就只能算so so。不要说是院士，离aps fellow的级别也还差了不少。引用率最高的一
篇文章还是95年到了arizona之后跟老外合作的，被引118次，这也是方唯一一篇被引用
上百次的文章。可见方励之89之前确实没有做出过什么重要的工作，他的名声和地位绝
对是靠政治得来的，当然其中部分的也是80年在中国搞科普所得，必须承认科普工作也是
有重要的社会意义的。
(BTW，有人说你这个搜索未必完整。不错，确实不能保证100％毫无遗漏。但是我
用的search engine is THE search engine everybody in this community uses today.
So, if any article is not found by this search engine, sadly, it simply doesn't matter,
because no one would ever n... 阅读全帖 |
|
T**E
发帖数: 1892 | 13 Neutrino experiment affirms faster-than-light claim - November 18, 2011
An updated version of this story is now available (see 'Neutrino experiment
replicates faster-than-light finding').
It is a remarkable confirmation of a stunning result; but most physicists
remain skeptical. That seems the most probable outcome of a release of new
data expected on 17 November from researchers with the Italian OPERA
collaboration, who say they have confirmed their controversial finding that
flighty subatomic ... 阅读全帖 |
|
L*m
发帖数: 235 | 14 2015诺贝尔物理奖
获奖人：Arthur B McDonald、Takaaki Kajita
获奖领域：实验高能物理
获奖原因：发现了中微子震荡，并因此证明了中微子具有质量
相关文章
Measurement of the Rate of νe+d→p+p+e− Interactions Produced by B8
Solar Neutrinos at the Sudbury Neutrino Observatory
Q. R. Ahmad et al. (SNO Collaboration)
Phys. Rev. Lett. 87, 071301 – Published 25 July 2001
Direct Evidence for Neutrino Flavor Transformation from Neutral-Current
Interactions in the Sudbury Neutrino Observatory
Q. R. Ahmad et al. (SNO Collaboration)
Phys. Rev. Lett. 89, 011301 – ... 阅读全帖 |
|
f*******d
发帖数: 339 | 15
What they are comparing are not upgoing and down going neutrinos,
(the upgoing neutrinos are very few), but rather mu neutrinos and
e neutrinos, these should have a ratio of 2:1, but experiment found
the ratio less than that. Also, no one has ever detected tau neutrinos
directly yet.
The trouble is, although solar neutrino,atomspheric neutrino and collider
experiment (LSND, and the future Chicago-Minnesota project)all show
neutrino oscillation, the results are inconsistent. To help solve this |
|
a****a
发帖数: 5763 | 16 http://www.washingtonpost.com/national/health-science/not-so-fa
Not so fast: Second experiment refutes faster-than-light particles
By Brian Vastag, Friday, March 16, 12:50 PM
Anyone who bet against Einstein better get out their wallet.
That’s because those supposedly faster-than-light particles that shook up
the world of physics last September are now looking a lot slower.
38
Comments
Weigh InCorrections?
Personal Post
A second experiment deep in an Italian mountain timed these subatomic
particl... 阅读全帖 |
|
c****t
发帖数: 19049 | 17 (Reuters) - Scientists around the world said on Friday the discovery of sub-
atomic particles apparently traveling faster than light could force a major
rethink of theories on the makeup of the cosmos, but the findings would
first have to be independently confirmed.
"Extraordinary claims require extraordinary evidence, and this is an
extraordinary claim," eminent cosmologist and astrophysicist Martin Rees
told Reuters.
The CERN research institute near Geneva said measurements over three years
ha... 阅读全帖 |
|
T*********r
发帖数: 11175 | 18 很多实验啊
有继续测oscillation的角度之类的(neutrino mass matrix)，
有测neutrino/anti-neutrino分别oscillation是否一致的(以检测CPT的)
有测是否有neutrinoless doublebeta decay的(lepton number violation)
。。。。。
甚至还有对撞机上找heavy pseudoDirac neutrino或者lepton number violation的
（当然这个有点牵强）
做理论模型的主要在flavor physics部分
一方面看neutrino的flavor和别的能不能扯上点，主要在gut之类的理论中
一方面看neutrino自己的flavor，有没有什么能indicate中微子理论模型的
还有不少和cosmology扯一块的，比如做些leptogenesis之类
当然还有做乱七八糟neutrino新模型的
不过这些估计得等我们理解了electron质量从哪里来的再说
呵呵 |
|
b***y
发帖数: 14281 | 19 No. The search include his early works up to 1978. Here is the same list
sorted by year.
1) The Influence of Gravitation on the Vacuum State.
By Li-Zhi Fang.
Acta Phys. Sinica 27 ( 1978) 181-18.
2) THE STRUCTURE AND STABILITY OF THE ABNORMAL NEUTRON STAR.
By Li-Zhi Fang, Qin-Yue Qu, Zhen-Ru Wang, Tan Lu, Liao-Fu Luo.
Sci.Sin.22:187-198,1979.
3) Some Recent Developments in Astrophysics. (Talk).
By Li-Zhi Fang, A. Qadir, R. Ruffini.
In *Nathiagali 1980, Proceedings, Physics and Contemporary Needs... 阅读全帖 |
|
R*k
发帖数: 264 | 20 http://arxiv.org/abs/1109.4897
这个网页现在很难打开，估计很多人在看，呵呵
The OPERA neutrino experiment at the underground Gran Sasso Laboratory has m
easured the
velocity of neutrinos from the CERN CNGS beam over a baseline of about 730 k
m with much higher
accuracy than previous studies conducted with accelerator neutrinos. The mea
surement is based on highstatistics
data taken by OPERA in the years 2009, 2010 and 2011. Dedicated upgrades of
the CNGS
timing system and of the OPERA detector, as well as a high preci... 阅读全帖 |
|
发帖数: 1 | 21 新假说声称解决了物理学最大的五个问题
物理学家提出了一个新模型，他们说解决了现代物理学中未解答的5个最大的问题，一
次全部解释了怪异的暗物质、微中子振荡、重子生成(baryogenesis)、宇宙膨胀、以及
强作用电荷共轭-宇称问题(strong CP problem，强CP问题)。
新模型称为SMASH，提出我们只需要六个新粒子，来协调物理学标准模型中的所有这些
差距。新模型背后的团队认为这将不会那么难测试。
该模型是由法国和德国物理学家组成的团队所发展出来的。他们认为不需要对标准模型
进行任何重大调整，只需要一些新的添加。
这还在初期阶段，但这是一个非常酷的论点，因为其他模型是设计来解释量子力学的奥
秘，例如超对称性(supersymmetry)，需要添加数百个我们从来没有见过足迹的新粒子。
反过来说，SMASH只需要六个：三个微中子，一个费米子(fermion)和一个包括两个粒子
的场。(在物理学中，场是物理或数学实体，在空间和时间上对每个点都有一个值。粒
子是场的激发态。)
为了要让你知道这5个基本(重大)问题是什么，我们将浏览所有这5个问题，从暗物质开
始。
2.暗物质Dar... 阅读全帖 |
|
c****t
发帖数: 19049 | 22 It appears that the faster-than-light neutrino results, announced last
September by the OPERA collaboration in Italy, was due to a mistake after
all. A bad connection between a GPS unit and a computer may be to blame.
Physicists had detected neutrinos travelling from the CERN laboratory in
Geneva to the Gran Sasso laboratory near L'Aquila that appeared to make the
trip in about 60 nanoseconds less than light speed. Many other physicists
suspected that the result was due to some kind of error, gi... 阅读全帖 |
|
x********i
发帖数: 905 | 23 2016 Breakthrough Prize in Fundamental Physics
The Breakthrough Prize in Fundamental Physics recognizes major insights into
the deepest questions of the Universe.
To the five teams below and their combined 1,377 team leaders and members
the award is presented for the fundamental discovery and exploration of
neutrino oscillations, revealing a new frontier beyond, and possibly far
beyond, the standard model of particle physics.
Daya Bay Reactor Neutrino Experiment, led by Yifang Wang, Institute of... 阅读全帖 |
|
发帖数: 1 | 24 【 以下文字转载自 Joke 讨论区 】
发信人: zero7 (007), 信区: Joke
标 题: 新假说声称解决了物理学最大的五个问题
发信站: BBS 未名空间站 (Mon Nov 7 20:27:47 2016, 美东)
新假说声称解决了物理学最大的五个问题
物理学家提出了一个新模型，他们说解决了现代物理学中未解答的5个最大的问题，一
次全部解释了怪异的暗物质、微中子振荡、重子生成(baryogenesis)、宇宙膨胀、以及
强作用电荷共轭-宇称问题(strong CP problem，强CP问题)。
新模型称为SMASH，提出我们只需要六个新粒子，来协调物理学标准模型中的所有这些
差距。新模型背后的团队认为这将不会那么难测试。
该模型是由法国和德国物理学家组成的团队所发展出来的。他们认为不需要对标准模型
进行任何重大调整，只需要一些新的添加。
这还在初期阶段，但这是一个非常酷的论点，因为其他模型是设计来解释量子力学的奥
秘，例如超对称性(supersymmetry)，需要添加数百个我们从来没有见过足迹的新粒子。
反过来说，SMASH只需要六个：三个微中子，一个费米子(... 阅读全帖 |
|
e*******n
发帖数: 4912 | 25 高能物理的绝唱
作者是王孟源，哈佛高能物理博士
现代高能物理始於1940年代的量子场论（Quantum Field Theory），最初的应用是以
量子电动力学（Quantum Electro-Dynamics，QED）来解释电磁力。
在1950年代，加速器的技术突飞猛进，数以百计的高能粒子被发现；物理学家在整理
这些粒子的时候，注意到各种对称性（Symmetry），其中最深奥困难也最重要的是规范
对称性（Gauge Symmetry）。其实QED本身就是一个规范场论，但是它只是规范场论中
最简单的一种，叫可交换规范场论（Abelian Gauge Theory）。
1954年，杨振宁和他的学生Robert Mills解决了非交换规范场论（Non-Abelian
Gauge Theory）的难题，高能物理理论界随即注意到用非交换规范场论来解释弱作用力
和强作用力（宇宙中只有四种作用力：电磁力、弱作用力、强作用力和重力）的可能，
但是具体的细节还不清楚。
1961年，当时在哈佛大学物理系的Sheldon Glashow领悟到电磁力和弱作用力如何混
... 阅读全帖 |
|
x****6
发帖数: 4339 | 26 下面是1998年到现在的屋里炸药奖，除中微子外，2008， 2004，1999这几年难道不是
你说的基本粒子或相互作用吗？
2008
Yoichiro Nambu
"for the discovery of the mechanism of spontaneous broken symmetry in
subatomic physics"
Makoto Kobayashi and Toshihide Maskawa
"for the discovery of the origin of the broken symmetry which predicts the
existence of at least three families of quarks in nature"
2004
David J. Gross, H. David Politzer and Frank Wilczek
"for the discovery of asymptotic freedom in the theory of the strong
interaction"
1999
Gerardus 't H... 阅读全帖 |
|
m*********a
发帖数: 3299 | 27 Jews .2% of world population, 20% of all Nobel prices, 40% of USA nobel
price, won more than 160 nobels.
All Asian are junk compare to Jewish people in your standard.
Literature[edit source | edit]
Year Laureate Country Rationale
1927 Bergson-Nobel-photo.jpg Henri Bergson[9][10] France "in
recognition of his rich and vitalizing ideas and the brilliant skill with
which they have been presented"[11]
1958 Boris Pasternak cropped.jpg Boris Pasternak[9][10] Sov... 阅读全帖 |
|
发帖数: 1 | 28 本人中微子物理博士，现在在做neutrino detector physics, neutrino experimental
data analysis, neutrino interaction simulation, heavy flavor
physics...
radiation,
急需审稿机会，联系邮箱 [email protected]/* */
跪谢 |
|
H******7
发帖数: 34403 | 29 The science world was left in shock when workers at the world's largest
physics lab announced they had recorded subatomic particles travelling
faster than the speed of light – a feat that Einstein said was impossible.
If the findings are proven to be accurate, they would overturn one of the
pillars of the Standard Model of physics, which explains the way the
universe and everything within it works.
Einstein's theory of special relativity, proposed in 1905, states that
nothing in the universe can... 阅读全帖 |
|
c*******7
发帖数: 17225 | 30 September 23, 2011 10:32 AM PrintText
Faster than light measurement shocks physicists
5 Comments
Have Your Say Email Story
Send to a FriendShare ThisTell Your FriendsTweet ThisTweet ThisMoreShare It.
Del.icio.usFacebookStumbleuponNewsvineYahoo bookmarksMixxDiggRedditGoogle
BookmarksTwitterLinkedInPlay CBS News Video
(AP) GENEVA - Physicists on the team that measured particles traveling
faster than light said Friday they were as surprised as their skeptics about
the results, which appear to viol... 阅读全帖 |
|
d********f
发帖数: 43471 | 31 【 以下文字转载自 Military 讨论区 】
发信人: evelynlin ((￣.￣)), 信区: Military
标 题: 高能物理的绝唱
发信站: BBS 未名空间站 (Mon Aug 22 10:55:42 2016, 美东)
高能物理的绝唱
作者是王孟源，哈佛高能物理博士
现代高能物理始於1940年代的量子场论（Quantum Field Theory），最初的应用是以
量子电动力学（Quantum Electro-Dynamics，QED）来解释电磁力。
在1950年代，加速器的技术突飞猛进，数以百计的高能粒子被发现；物理学家在整理
这些粒子的时候，注意到各种对称性（Symmetry），其中最深奥困难也最重要的是规范
对称性（Gauge Symmetry）。其实QED本身就是一个规范场论，但是它只是规范场论中
最简单的一种，叫可交换规范场论（Abelian Gauge Theory）。
1954年，杨振宁和他的学生Robert Mills解决了非交换规范场论（Non-Abelian
Gauge Theory）的难题，高能物理理论界随... 阅读全帖 |
|
B********e
发帖数: 19317 | 32 【 以下文字转载自 Joke 讨论区 】
发信人: Huan2007 (胡绵涛), 信区: Joke
标 题: Re: 收音机正在说老爱错了，超光速可行
发信站: BBS 未名空间站 (Thu Sep 22 18:23:40 2011, 美东)
The science world was left in shock when workers at the world's largest
physics lab announced they had recorded subatomic particles travelling
faster than the speed of light – a feat that Einstein said was impossible.
If the findings are proven to be accurate, they would overturn one of the
pillars of the Standard Model of physics, which explains the way the
universe and ev... 阅读全帖 |
|
v*****s
发帖数: 20290 | 33 【 以下文字转载自 Joke 讨论区 】
发信人: Huan2007 (胡绵涛), 信区: Joke
标 题: Re: 收音机正在说老爱错了，超光速可行
发信站: BBS 未名空间站 (Thu Sep 22 18:23:40 2011, 美东)
The science world was left in shock when workers at the world's largest
physics lab announced they had recorded subatomic particles travelling
faster than the speed of light – a feat that Einstein said was impossible.
If the findings are proven to be accurate, they would overturn one of the
pillars of the Standard Model of physics, which explains the way the
universe and ev... 阅读全帖 |
|
d*b
发帖数: 21830 | 34 Where did you get your degree? There are many ways to do the experiment.
Just give you one idea:
Neutrino has energy, when it slows down, it loses energy through Cerenkov
radiation. You can do measurement on neutrino by counting photons. Most
modern neutrino experiments do in this way. |
|
q*d
发帖数: 22178 | 35 下到这本书的电子版无数天了,每次读都被书最开始的option price,
Black-Scholes model这些我根本不知所云的概念吓住,没继续下去,
直到近日,版上有人重新提到这本书,终于捏着鼻子把序言部分读完,
看到第一章他怎么学物理的,里面提及一些物理学史的部分,错误无数:
1.这厮是南非人,在开普敦读的本科,1966年到哥大读PHD
2.他的PHD读了7年,正如本版已经有人指出的,他的解释是他在
开普敦没有受到很好的教育,在哥大必须要上3还是4年的课.
3.第一章23页,当提及Fermi的时候,他说"Amazingly,he was also
the theorist who, in the 1930s, had predicted the existence
of the neutrino"--neutrino是Pauli最先预言的吧,名字是Fermi起的.
4.第一章24页,"Willis Lamb and Polykarp Kush,both at Columbia in
the late 1940s,had carefully and accurately mea... 阅读全帖 |
|
d*b
发帖数: 21830 | 36 不可能，要错也是neutrino理论错了，你们学过neutrino的话就会明白，neutrino理论
不是在ustandard model里衍生出来的，是个维像理论。 |
|
p******e
发帖数: 58 | 37
(sorry, this might be too late. )
I should say, there's no final words on it yet.
The current model (also a widely accepted one) requires
neutrino mass = 0. However, many are still thinking of
the possibility of none 0 mass.
There are a few hints from experiment, that may suggests
neutrino mass. One is from solar neutrino, one get quite
different results from what we expect. The expectation
is coming from 1.particle model + 2.sun model. If we are
confident enough on 2, or different 2 can no |
|
m*******r
发帖数: 66 | 38 for pioneering contributions to astrophysics, in particular for the
detection of cosmic neutrinos"
Raymond Davis Jr.
USA
Masatoshi Koshiba
Japan
Riccardo Giacconi
USA
今年诺贝尔奖在物理与宇宙微粒和辐射的发现和侦查有关, 从研究二个新领域涌现
, neutrino 天文和X-射线天文。奖联合被授予与一个一半对: Raymond 迪维斯
Jr , 物理和天文, 大学宾夕法尼亚, 费城, 美国, 和Masatoshi Koshiba , 基本
的微粒物理的国际中心, 东京,日本大学的部门, " 为当先驱对天体物理学的贡献,
特别是为宇宙 neutrinos ", 和第二个 一半的侦查对 Riccardo Giacconi ,
Associated Universities, Inc., 华盛顿特区, 美国 , " 为当先驱对天体物理学
的贡献, 导致在宇宙X-射线来源上的发现" 。 这科学家的得奖成就的描述。
上述中文资料由软 |
|
a***r
发帖数: 594 | 39 美国的划分也是这样的。比如：
MIT 物理系的“核物理实验室”涵盖该系的理论物理中心：
http://web.mit.edu/lns/research/index.html
research interests: anti-matter, neutrino physics, dark matter, structure of
proton, structure of high density matter and early universe.
Research on neutrino oscillation (standard and slightly beyong standard
model physics), protron structure (asymptotic and none asymptotic QCD) and
high density matter (heavy ion collider) are loosely considered topics of
modern nuclear physics.
MIT 的核工程系。
http://web.mit.... 阅读全帖 |
|
a***y
发帖数: 19743 | 40 【 以下文字转载自 Physics 讨论区 】
发信人: aaaty (阿fan提), 信区: Physics
标 题: 狭义相对论可能被推翻
发信站: BBS 未名空间站 (Thu Sep 22 16:20:15 2011, 美东)
http://www.reuters.com/article/2011/09/22/science-light-idUSL5E
Particles recorded moving faster than light - CERN
(Reuters) - An international team of scientists has recorded neutrino
particles travelling faster than the speed of light, a spokesman for the
researchers said on Thursday -- in what could be a challenge to one of the
fundamental rules of physics.
Antonio Ereditato,... 阅读全帖 |
|
l**i
发帖数: 8144 | 41 One of the best hopes to verify or disprove the findings comes from Fermilab
's MINOS experiment, which also sends neutrinos flying underground over a
similar distance to end up at the Soudan mine in Minnesota. In 2007, MINOS
researchers found a trend in their data that suggested neutrinos might be
arriving early, as they do in the new CERN data. However, the experiment at
the time did not have enough precision to rule out the possibility that the
results were a statistical fluke.
以前也有人做过 可能实验精度... 阅读全帖 |
|
T*********r
发帖数: 11175 | 42 http://arxiv.org/abs/hep-ph/0305062
Destruction of Nuclear Bombs Using Ultra-High Energy Neutrino Beam
Hirotaka Sugawara (Univ. of Hawaii), Hiroyuki Hagura (KEK), Toshiya Sanami (
KEK)
(Submitted on 7 May 2003 (v1), last revised 29 Jun 2003 (this version, v2))
We discuss the possibility of utilizing the ultra-high energy neutrino beam
(about 1000 TeV) to detect and destroy the nuclear bombs wherever they are
and whoever possess them.
Comments: 18 pages, 8 figures, LaTeX2e; Typos corrected, so... 阅读全帖 |
|
E*********9
发帖数: 244 | 43 This document was written by US scientists:
DEMONSTRATION OF COMMUNICATION USING NEUTRINOS
Beams of neutrinos have been proposed as a vehicle for communications under
unusual circumstances, such as direct point-to-point global communication,
communication with submarines, secure communications and interstellar
communication. We report on the performance of a low-rate communications
link established using the NuMI beam line and the MINERvA detector at
Fermilab. The link achieved a decoded data ra... 阅读全帖 |
|
h********r
发帖数: 3291 | 44 哇，这贴这么火，攀岩运动蓬勃发展。
个人认为，刚开始只要一个腰带，act, 和locking biner就可以了。头几次最好和有经
验的人一起，他们一般都有全套的biner, pro, 等。先蹭他们的。自己只需要prussik
，a few slings, 和Personal Anchor System（可用sling，推荐Metolius Personal
Anchor System http://www.metoliusclimbing.com/pas.htm ）
等出去了几次，自己对需要什么，喜欢什么就会有更多认识，再买不迟。
对于unlocking biner或quickdraw，推荐wild country helium。超轻，和bd的
Neutrino差不多，感觉比Neutrino好。但也有人complain太轻了，手感不好。
另外，一般来说wired biner比solid的轻和牢。 |
|
h********r
发帖数: 3291 | 45 哇，这贴这么火，攀岩运动蓬勃发展。
个人认为，刚开始只要一个腰带，act, 和locking biner就可以了。头几次最好和有经
验的人一起，他们一般都有全套的biner, pro, 等。先蹭他们的。自己只需要prussik
，a few slings, 和Personal Anchor System（可用sling，推荐Metolius Personal
Anchor System http://www.metoliusclimbing.com/pas.htm ）
等出去了几次，自己对需要什么，喜欢什么就会有更多认识，再买不迟。
对于unlocking biner或quickdraw，推荐wild country helium。超轻，和bd的
Neutrino差不多，感觉比Neutrino好。但也有人complain太轻了，手感不好。
另外，一般来说wired biner比solid的轻和牢。 |
|
c*******r
发帖数: 13580 | 46 Neutrino is good for racking Cams, especially C4 since the color coding
matches :) I have a bunch of Neutrinos that I use for spare non-locking
biners.
All my alpine draws use BD Oz, Camp Nano, and Mammut Moses. They are all
good. Camp Nano is a bit small though.
Rocklock is perfect for the main locker for its lightness, reasonably big
size, and roundness (I use reverso 3 with rock lock, so roundness is
important). mini is good for building anchors because it's big enough for
clove/munter hitche |
|
|
o******1
发帖数: 12177 | 48 If you replace photon with graviton, that is ok, because graviton doesn't
have a mass either. But you simply can not replace photon with neutrino,
because neutrino indeed has a mass, although very small. |
|
|
v*****s
发帖数: 20290 | 50 'We have broken speed of light' 22 Sep 2011
Antonio Ereditato, spokesman for the researchers, said: "We have high
confidence in our results. We have checked and rechecked for anything that
could have distorted our measurements but we found nothing.
"We now want colleagues to check them independently."
A total of 15,000 beams of neutrinos were fired over a period of 3 years
from CERN towards Gran Sassoin Italy, 730km (500 miles) away, where they
were picked up by giant detectors.
Light would hav... 阅读全帖 |
|
