Are there any Baryons that have quark-antiquark combinations?Are there notable cases of anomalies in the mass-decay rate relationship?What's the difference between Quark Colors and Quark Flavours?Why are all mesons unstableDo particle and antiparticle annihilate when they meet?What's the difference between a pentaquark and a proton?Mass of the mesons in a universe with massless quarksHow to understand the makeup of neutral pi and eta mesons?Why is usual matter made up of $n,p$ and $e^-$?
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Are there any Baryons that have quark-antiquark combinations?
Are there notable cases of anomalies in the mass-decay rate relationship?What's the difference between Quark Colors and Quark Flavours?Why are all mesons unstableDo particle and antiparticle annihilate when they meet?What's the difference between a pentaquark and a proton?Mass of the mesons in a universe with massless quarksHow to understand the makeup of neutral pi and eta mesons?Why is usual matter made up of $n,p$ and $e^-$?
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$begingroup$
I'll be honest, I only have a Highschool education, so there might be something obvious I'm overlooking. However particle physics is of massive Interest to me.
My question is, I know there are unstable quark-antiquark pairs that form Mesons, but are there any Baryons that are not wholly made up of quarks or antiquarks? i.e. "up, up, anti-down"
If the answer is no, why not?
particle-physics mesons baryons
edited 8 hours ago
Brick
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asked 8 hours ago
StefanStefan
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add a comment
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$begingroup$
I'll be honest, I only have a Highschool education, so there might be something obvious I'm overlooking. However particle physics is of massive Interest to me.
My question is, I know there are unstable quark-antiquark pairs that form Mesons, but are there any Baryons that are not wholly made up of quarks or antiquarks? i.e. "up, up, anti-down"
If the answer is no, why not?
particle-physics mesons baryons
edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
asked 8 hours ago
StefanStefan
234 bronze badges
New contributor
Stefan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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4
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago
add a comment
|
$begingroup$
I'll be honest, I only have a Highschool education, so there might be something obvious I'm overlooking. However particle physics is of massive Interest to me.
My question is, I know there are unstable quark-antiquark pairs that form Mesons, but are there any Baryons that are not wholly made up of quarks or antiquarks? i.e. "up, up, anti-down"
If the answer is no, why not?
particle-physics mesons baryons
edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
asked 8 hours ago
StefanStefan
234 bronze badges
New contributor
Stefan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
$endgroup$
I'll be honest, I only have a Highschool education, so there might be something obvious I'm overlooking. However particle physics is of massive Interest to me.
My question is, I know there are unstable quark-antiquark pairs that form Mesons, but are there any Baryons that are not wholly made up of quarks or antiquarks? i.e. "up, up, anti-down"
If the answer is no, why not?
particle-physics mesons baryons
particle-physics mesons baryons
edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
asked 8 hours ago
StefanStefan
234 bronze badges
New contributor
Stefan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 8 hours ago
Brick
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asked 8 hours ago
StefanStefan
234 bronze badges
New contributor
Stefan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
edited 8 hours ago
Brick
2,06010 silver badges22 bronze badges
2,06010 silver badges22 bronze badges
asked 8 hours ago
StefanStefan
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Stefan is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 8 hours ago
StefanStefan
234 bronze badges
asked 8 hours ago
StefanStefan
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234 bronze badges
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New contributor
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4
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago
add a comment
|
4
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago
4
4
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago
add a comment
|
2 Answers
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No, a three-quark baryon can not be be made out of two quarks and one anti-quark (and vice versa) as this would necessarily give the particle color.
Each quark caries one of three colors (red, blue, green) and each anti-quark respectively carries anti-color. Color is an additive quantity when constructing particle and the result must be color-neutral, i.e. it either carries for example red + anti-red or red + blue + green. Although we can not observe the "color" of a particle directly (as all articles must be color-neutral), we can measure its effects indirectly via certain cross-sections.
With this being said, we can now clearly see that there is no way in which we can construct particles of two-quarks and one anti-quark as any possible combination would not be color-neutral. Hence, color-neutrality forbids observable three-quark particles composed out of quarks and anti-quarks.
Penta-quarks however can contain quarks and anti-quarks as mentioned in a previous answer.
answered 7 hours ago
edhedh
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Pentaquarks can contain three quarks and a quark-antiquark pair, and they are baryons, since baryons are defined as having an odd number of valence quarks.
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
$endgroup$
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So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
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– Stefan
8 hours ago
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2 Answers
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2 Answers
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$begingroup$
No, a three-quark baryon can not be be made out of two quarks and one anti-quark (and vice versa) as this would necessarily give the particle color.
Each quark caries one of three colors (red, blue, green) and each anti-quark respectively carries anti-color. Color is an additive quantity when constructing particle and the result must be color-neutral, i.e. it either carries for example red + anti-red or red + blue + green. Although we can not observe the "color" of a particle directly (as all articles must be color-neutral), we can measure its effects indirectly via certain cross-sections.
With this being said, we can now clearly see that there is no way in which we can construct particles of two-quarks and one anti-quark as any possible combination would not be color-neutral. Hence, color-neutrality forbids observable three-quark particles composed out of quarks and anti-quarks.
Penta-quarks however can contain quarks and anti-quarks as mentioned in a previous answer.
answered 7 hours ago
edhedh
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$begingroup$
No, a three-quark baryon can not be be made out of two quarks and one anti-quark (and vice versa) as this would necessarily give the particle color.
Each quark caries one of three colors (red, blue, green) and each anti-quark respectively carries anti-color. Color is an additive quantity when constructing particle and the result must be color-neutral, i.e. it either carries for example red + anti-red or red + blue + green. Although we can not observe the "color" of a particle directly (as all articles must be color-neutral), we can measure its effects indirectly via certain cross-sections.
With this being said, we can now clearly see that there is no way in which we can construct particles of two-quarks and one anti-quark as any possible combination would not be color-neutral. Hence, color-neutrality forbids observable three-quark particles composed out of quarks and anti-quarks.
Penta-quarks however can contain quarks and anti-quarks as mentioned in a previous answer.
answered 7 hours ago
edhedh
514 bronze badges
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edh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$
add a comment
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$begingroup$
No, a three-quark baryon can not be be made out of two quarks and one anti-quark (and vice versa) as this would necessarily give the particle color.
Each quark caries one of three colors (red, blue, green) and each anti-quark respectively carries anti-color. Color is an additive quantity when constructing particle and the result must be color-neutral, i.e. it either carries for example red + anti-red or red + blue + green. Although we can not observe the "color" of a particle directly (as all articles must be color-neutral), we can measure its effects indirectly via certain cross-sections.
With this being said, we can now clearly see that there is no way in which we can construct particles of two-quarks and one anti-quark as any possible combination would not be color-neutral. Hence, color-neutrality forbids observable three-quark particles composed out of quarks and anti-quarks.
Penta-quarks however can contain quarks and anti-quarks as mentioned in a previous answer.
answered 7 hours ago
edhedh
514 bronze badges
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edh is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$
No, a three-quark baryon can not be be made out of two quarks and one anti-quark (and vice versa) as this would necessarily give the particle color.
Each quark caries one of three colors (red, blue, green) and each anti-quark respectively carries anti-color. Color is an additive quantity when constructing particle and the result must be color-neutral, i.e. it either carries for example red + anti-red or red + blue + green. Although we can not observe the "color" of a particle directly (as all articles must be color-neutral), we can measure its effects indirectly via certain cross-sections.
With this being said, we can now clearly see that there is no way in which we can construct particles of two-quarks and one anti-quark as any possible combination would not be color-neutral. Hence, color-neutrality forbids observable three-quark particles composed out of quarks and anti-quarks.
Penta-quarks however can contain quarks and anti-quarks as mentioned in a previous answer.
answered 7 hours ago
edhedh
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edited 7 hours ago
answered 7 hours ago
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answered 7 hours ago
edhedh
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answered 7 hours ago
edhedh
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Pentaquarks can contain three quarks and a quark-antiquark pair, and they are baryons, since baryons are defined as having an odd number of valence quarks.
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
$endgroup$
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
add a comment
|
$begingroup$
Pentaquarks can contain three quarks and a quark-antiquark pair, and they are baryons, since baryons are defined as having an odd number of valence quarks.
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
$endgroup$
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
add a comment
|
$begingroup$
Pentaquarks can contain three quarks and a quark-antiquark pair, and they are baryons, since baryons are defined as having an odd number of valence quarks.
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
$endgroup$
Pentaquarks can contain three quarks and a quark-antiquark pair, and they are baryons, since baryons are defined as having an odd number of valence quarks.
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
answered 8 hours ago
DannyDanny
6903 silver badges10 bronze badges
6903 silver badges10 bronze badges
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
add a comment
|
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
$begingroup$
So there aren't any known 3 quark baryons which have 2 quarks and an antiquark or vice versa?
$endgroup$
– Stefan
8 hours ago
add a comment
|
Stefan is a new contributor. Be nice, and check out our Code of Conduct.
Stefan is a new contributor. Be nice, and check out our Code of Conduct.
Stefan is a new contributor. Be nice, and check out our Code of Conduct.
Stefan is a new contributor. Be nice, and check out our Code of Conduct.
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4
$begingroup$
I don't think you can have $qqoverlineq$ and respect colour confinement.
$endgroup$
– jacob1729
8 hours ago