The Naked Scientists
  • Login
  • Register
  • Podcasts
      • The Naked Scientists
      • eLife
      • Naked Genetics
      • Naked Astronomy
      • In short
      • Naked Neuroscience
      • Ask! The Naked Scientists
      • Question of the Week
      • Archive
      • Video
      • SUBSCRIBE to our Podcasts
  • Articles
      • Science News
      • Features
      • Interviews
      • Answers to Science Questions
  • Get Naked
      • Donate
      • Do an Experiment
      • Science Forum
      • Ask a Question
  • About
      • Meet the team
      • Our Sponsors
      • Site Map
      • Contact us

User menu

  • Login
  • Register
  • Home
  • Help
  • Search
  • Tags
  • Member Map
  • Recent Topics
  • Login
  • Register
  1. Naked Science Forum
  2. Non Life Sciences
  3. Physics, Astronomy & Cosmology
  4. Proton/Antiproton interaction
« previous next »
  • Print
Pages: [1]   Go Down

Proton/Antiproton interaction

  • 3 Replies
  • 2431 Views
  • 0 Tags

0 Members and 1 Guest are viewing this topic.

Offline PmbPhy (OP)

  • Naked Science Forum King!
  • ******
  • 3751
  • Activity:
    3.5%
  • Thanked: 117 times
    • View Profile
Proton/Antiproton interaction
« on: 02/08/2014 06:42:31 »
In a previous thread the subject came up about the end products of proton/anti-proton interactions. Some of them yield two or more photons at the end of the series. Sometimes the first step in the series is this; (let p proton, ap = antiproton)

4fd67a3848a696e3dd4116394a09a1f7.gif

I wanted to know where I can find the percent of cases where this happens. I asked in the previous thread but never got an answer. I looked in the Handbook of Chemistry and Physics but nothing like that was in there.

Does anybody know the answer or where I can find it and what it's value is. I'm hoping good-ole JP will have the answer. JP?

Note: I don't merely want the answer but I want the source of the answer too or how to calculate it.
Logged
 



Online evan_au

  • Global Moderator
  • Naked Science Forum King!
  • ********
  • 6839
  • Activity:
    57%
  • Thanked: 697 times
    • View Profile
Re: Proton/Antiproton interaction
« Reply #1 on: 02/08/2014 07:17:02 »
You could try "Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel", which reports on experiments at CERN.

http://arxiv.org/pdf/hep-ex/9708025.pdf
Logged
 

Offline PmbPhy (OP)

  • Naked Science Forum King!
  • ******
  • 3751
  • Activity:
    3.5%
  • Thanked: 117 times
    • View Profile
Re: Proton/Antiproton interaction
« Reply #2 on: 02/08/2014 07:34:45 »
Quote from: evan_au on 02/08/2014 07:17:02
You could try "Proton-Antiproton Annihilation and Meson Spectroscopy with the Crystal Barrel", which reports on experiments at CERN.

http://arxiv.org/pdf/hep-ex/9708025.pdf
Why? Did you read it? I took a look at it and can't find anything about it. I know that there are tons of papers on this subject but I have neither the timer nor the patience to sift through them all. That's why I started this thread. I.e. I wanted to find someone who already knows where the information is. Thanks for trying though.
Logged
 

Offline UltimateTheory

  • Sr. Member
  • ****
  • 107
  • Activity:
    0%
  • Thanked: 1 times
    • View Profile
    • Ultimate Theory of the Universe
Re: Proton/Antiproton interaction
« Reply #3 on: 02/08/2014 14:16:48 »
You should search for "cern proton antiproton branch ratio" (or replace "cern" by specific accelerator name)

for instance this paper
http://cds.cern.ch/record/280676/files/9504362.pdf

mentions such values:
 [ Invalid Attachment ]
(enlarge image http://www.thenakedscientists.com/forum/index.php?action=dlattach;topic=52059.0;attach=19031;image )

Pion+ Pion- branch has ratio 0.37% +-0.3

while pion+ pion- pion0 pion0 ... (more pions 0) has nearly 36%

* Proton Antiproton Annihilation.jpg (84.26 kB, 1920x901 - viewed 686 times.)
« Last Edit: 02/08/2014 14:19:47 by UltimateTheory »
Logged
Ultimate Theory of the Universe
http://www.ultimate-theory.com
 



  • Print
Pages: [1]   Go Up
« previous next »
Tags:
 

Similar topics (5)

Can we "see" a proton?

Started by Maniax101Board Physics, Astronomy & Cosmology

Replies: 5
Views: 7633
Last post 18/01/2011 09:24:08
by CliffordK
why do we not have Proton stars, yet we have Neutron Stars

Started by Fluid_thinkerBoard Physics, Astronomy & Cosmology

Replies: 3
Views: 3406
Last post 12/06/2009 10:00:02
by Shadec
Can knocking a proton from the nucleus make electrons, electron voltage change?

Started by Nicholas LeeBoard Chemistry

Replies: 2
Views: 1929
Last post 25/07/2016 10:37:45
by evan_au
Large Hadron (Proton) Collider Switerland to be switch on Wednesday ???

Started by Alan McDougallBoard Physics, Astronomy & Cosmology

Replies: 6
Views: 5367
Last post 06/09/2008 11:50:47
by rich42
mobile proton versus charge-remote fragmentation

Started by BlooGooBoard Chemistry

Replies: 0
Views: 4297
Last post 03/03/2004 23:42:40
by BlooGoo
There was an error while thanking
Thanking...
  • SMF 2.0.15 | SMF © 2017, Simple Machines
    Privacy Policy
    SMFAds for Free Forums
  • Naked Science Forum ©

Page created in 0.123 seconds with 42 queries.

  • Podcasts
  • Articles
  • Get Naked
  • About
  • Contact us
  • Advertise
  • Privacy Policy
  • Subscribe to newsletter
  • We love feedback

Follow us

cambridge_logo_footer.png

©The Naked Scientists® 2000–2017 | The Naked Scientists® and Naked Science® are registered trademarks created by Dr Chris Smith. Information presented on this website is the opinion of the individual contributors and does not reflect the general views of the administrators, editors, moderators, sponsors, Cambridge University or the public at large.