Questions tagged [protons]

A proton is a positively charged particle which is generally considered to be a composite particle comprising of three quarks interacting through the strong force (e.g. in the standard model.)

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Calculating Binding Energy of Th 230 nucleus [duplicate]

Ok this is NOT a homework question. But it’s somewhat related. Please bear with me. In calculating BE of Th 230, I used the rest mass of proton as 1.007276u and rest mass of neutron as 1.008665u (as ...
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What if proton is heavier than neutron? [closed]

What really happens to the atom if proton gets heavier than a neutron. I've heard that proton emits radiation. Plz explain
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What will happen if we keep bringing two protons closer and closer to each other, starting from a large distance?

I am asking this question for theoretical understanding of the topic: What will happen if we keep bringing two protons closer and closer to each other, starting from a large distance? I understand ...
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Do neutrons have a higher entropy than protons?

Since free neutrons want to undergo beta decay into a proton while protons are relatively stable does that mean that neutrons have higher entropy than protons?
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What does it mean to carry 'a fraction of the proton's spin'?

The proton spin crisis is an open problem in physics regarding the origin of the spin of the proton. The problem is described as some "fraction of the proton's spin" being unaccounted for. ...
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Can an electron be produced inside a proton?

We know that inside a proton there is a sea of quarks, antiquarks and gluons. This happens as the valence quarks emit gluons which then split into a quark-antiquark pairs. These pairs become gluons ...
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Why do protons not show a "classical" mass defect?

An atomic nucleus consists of protons and neutrons, held together by the strong nuclear force (i.e. gluons). The heavier a nucleus gets, the more neutrons have to be added to overcome the increasing ...
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Effects of a hypothetical "proton-decay bomb" for a fictional story [closed]

I'm writing a science fiction story in which I need a devastating weapon of mass destruction that is far worse than nuclear bombs. For some reason, I'm fascinated by the idea of a "proton-decay ...
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Why so much kinetic energy inside a proton?

I'm reading 'Waves in an impossible sea' by Matt Strassler - a very good, popular science book, by the way - and he explains that the rest mass of a proton mostly comes from the kinetic energy of the ...
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Can the protium nucleus be in an excited state?

An electron in protium can absorb a photon and jump to an orbit of higher energy. Is an analogous procedure possible for the nucleus of protium (a single proton)? Can this nucleus be in an excited ...
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How does pion exchange cause protons and neutrons to be attracted to each other? [duplicate]

I read that neutron and protons are attracted through exchanging pions between each other. However, as far as I understand, they are just exchanging a meson, not any force carriers. What causes them ...
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How can a proton be stable if binding energy *increases* it's mass? [duplicate]

A hydrogen atom weighs 13.6eV less than a proton + electron. This missing energy, which is tiny compared to the rest mass of almost a GeV, was carried off by a photon when the atom formed. Nuclei show ...
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Does the proton do anything in a simple electric DC circuit? [closed]

Since the valence or free electrons and doing the flowing guided by electromagnetic field, what about the protons that are still stuck in the nucleus inside the wire, battery, resistor what have you ...
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Quantum Chromodynamics (QCD) Prediction of Proton Mass

I’m trying to understand the prediction of the proton mass according to Quantum Chromodynamics (QCD). I know that the proton is composed of quarks and gluons, and that the mass of the proton is not ...
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Are quarks real particles? Or only combination form of leptons inside nucleons? [duplicate]

There are not any free and independent quark in the nature. Collision of many particles inside most powerful accelerators could not produced any free and independent quark but result of collision ...
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Is electric charge dependent on mass of an object? [closed]

I got this question while reading about electrons and protons where electrons having less mass than protons but possess the same amount of electric charge,though negative. Could you please elaborate ...
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High energy collision of two proton

Suppose there are two protons ( as we have in LHC). One proton is coming from +ve z axis and other from -ve z axis toward the collision point(origin). Both proton collide with equal velocity. Now as ...
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What forces are responsible for the conservation of momentum at the subatomic scale?

When I throw a ball at a wall and it bounces off of it and there is conservation of momentum we can say that the springiness of the ball and the wall is the action reaction force responsible for the ...
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Charge distribution of a proton

I've been studying high-school level physics and I noticed that protons are composed of up-up-down quarks. It is known that fields can be non-uniform due to geometries: Earth's gravity field is not ...
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How do protons transfer from one object to another by induction?

Charging by induction begins with a positively charged object and a neutral object which causes the electrons on the neutral object to be closer to the charged object. In diagrams I saw online, when ...
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If we have a beam of photons and a beam of protons with the same energy, which one will get further inside the human body?

If we have a beam of photons (high energy X-ray) and a beam of protons both with the same energy, which one will get further inside the human body and why? Can this be explaind due to LET (Linear ...
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Where can I find accurate visual representations of atomic nucleus nucleons wave probability functions like I see for electron atomic orbitals?

Note the Wikipedia article for 'Atomic nucleus' was awkward here because first they depict the old concept with protons and neutrons as a bunch of spheres touching each other and in the sub-text ...
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Reducing Inelastic Electron-Proton's Scattering Cross Section to Rosenbluth's Formula

I'm currently studying electron-proton scattering from Halzen & Martin's book (Quarks & Leptons : An Introductory Course in Modern Particle Physics). I found that the cross section for the ...
1 vote
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Charge conjugation and Transition form factors

Let us consider the transition form factor of proton to Delta (see reference of https://doi.org/10.1103/PhysRevD.100.034001): $\gamma^{\ast}p \to \Delta$. Then we should also have the timelike ...
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Condition on debroglie wavelength to probe the proton

What is the condition of the debroglie wavelength of an e.g electron beam such that we can probe the proton? Do we require that $\lambda <$size of proton or do we require that $\lambda ≈$ size of ...
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Kinetic energy of quarks in a proton

If we say that a proton has a kinetic energy of 50 GeV, can we say that each of the three quarks that compose it have roughly a mean energy of $\approx \frac{50}3=17$ GeV?
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Does free neutron decay create a hydrogen atom?

When a free neutron decays, it is transformed into a proton, an electron, and a neutrino. Does this electron begin to "orbit" the proton, forming a hydrogen atom? Or does the electron run ...
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Is a neutron the mixture of a proton and an electron?

Is a neutron a combination of a proton and an electron either by mass and/or charge?
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Vertex function QED and Deeply Virtual Compton Scattering (DVCS)

In QED we have one vertex where one line is virtual and the other two are physical: But recently I came across the so-called Deeply Virtual Compton Scattering in which, after the interaction of an ...
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Why are there no antimatter-antimatter collisions in CERN?

The labs at CERN create anti-Protons, and have collided them with Protons. Anti-Hydrogen is used to study matter-antimatter asymmetry. Were there any attempts to collide anti-Protons with anti-Protons?...
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