Timeline for Antimatter Question
Current License: CC BY-SA 4.0
14 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 25, 2022 at 4:43 | answer | added | BillOnne | timeline score: 0 | |
| Sep 25, 2022 at 4:29 | comment | added | James | Thanks @anna v. | |
| Sep 25, 2022 at 4:28 | comment | added | anna v | There are no free quarks/antiquarks to do such an experiment. Antiups may meet a top quark only within complicated interactions with many particles output . | |
| Sep 25, 2022 at 4:12 | comment | added | James | @2Ring thanks, that is helpful. So if antiup meets a top quark, would we expect to see many products? Not just photons, but heavier particles and the sum of all of those would satisfy conservation of quantum numbers? | |
| Sep 25, 2022 at 3:37 | comment | added | James | @Ghoster, thank you. It makes more sense now. | |
| Sep 25, 2022 at 3:32 | comment | added | PM 2Ring | You may enjoy my answer here: physics.stackexchange.com/a/451337/123208 Also check out the questions on the Related list. | |
| Sep 25, 2022 at 3:21 | comment | added | James | @FlatterMann, thank you. I understand now. So the lepton number is -1 and the charge is +1. So the equation would be balanced by an antineutrino and a proton (yes, I cheated, it was on wikipedia, but that makes sense). Thank you. | |
| Sep 25, 2022 at 3:12 | comment | added | FlatterMann | You get the answer from charge and lepton number conservation. What are the lepton numbers of a positron and neutron? Can you make a balanced equation that satisfies charge and lepton number conservation at the same time? | |
| Sep 25, 2022 at 3:10 | comment | added | Ghoster | Not annihilating is not the same as not interacting. For example, a positron is charged and a neutron has a magnetic moment, so they should interact electromagnetically. They can also interact by the weak interaction, and gravitationally. | |
| Sep 25, 2022 at 3:09 | comment | added | Ghoster | Since you asked about a positron and a neutron, I should have said “Neither a neutron, nor the quarks and gluons inside it, are the antiparticle of a positron.” | |
| Sep 25, 2022 at 3:04 | comment | added | James | So they simply wouldn't interact? And what about extending the argument. If an up quark meets and anti-charmed/top. Simply no interaction? | |
| Sep 25, 2022 at 2:59 | comment | added | Ghoster | Wikipedia: “Annihilation is the process that occurs when a subatomic particle collides with its respective antiparticle to produce other particles.” [Emphasis mine.] Neither an anti-neutron, nor the antiquarks and gluons inside it, are the antiparticle of an electron. Annihilation is not between random matter and antimatter but between particles and their specific antiparticles. | |
| S Sep 25, 2022 at 2:47 | review | First questions | |||
| Sep 25, 2022 at 3:42 | |||||
| S Sep 25, 2022 at 2:47 | history | asked | James | CC BY-SA 4.0 |