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Standard Model of Particle Physics - MGMAT - drop-down menu

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Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink] New post 20 Aug 2012, 00:19
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Each circle in the diagram represents a type of subatomic particle in the Standard Model, according to which particles fall into two classes, fermions and bosons. Fermions are either leptons or quarks.
Bosons carry particular forces between other particles. Particle types linked directly by a blue line interact by means of the force associated with the boson type; particle types not so linked do not interact.
Photons carry the electromagnetic force; W and Z bosons carry the weak nuclear force; and gluons carry the strong nuclear force. Finally, particles that interact with the still-hypothetical Higgs boson obtain
their mass via this interaction, although even massless particles (such as photons) are subject to gravitational effects via general relativity.

Attachment:
Standard-Model.png
Standard-Model.png [ 31.65 KiB | Viewed 525 times ]


From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

(1) The force that affects quarks but not leptons is the __________ force.
strong nuclear
weak nuclear
electromagnetic
gravitational


(2) A boson that cannot carry a force between other bosons of precisely the same type is a __________ .
W boson
Z boson
gluon
Higgs boson


SOLUTIONS:

[Reveal] Spoiler:
(1) strong nuclear
(2) Z boson
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Re: Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink] New post 26 Aug 2012, 00:56
I got first one can anyone explain second question? :roll:
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Re: Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink] New post 26 Aug 2012, 01:21
dhirajdas53 wrote:
I got first one can anyone explain second question? :roll:


Here's the OE:

[Reveal] Spoiler:
Statement 1: strong nuclear. You are told that bosons carry particular forces, and that the blue lines show what interactions are possible. You are asked to identify the force that affects quarks but not leptons. Since the bosons correspond to forces, you can rephrase the problem: what boson “touches” quarks but not leptons via a blue line?

Following the blue lines, you can see that the only boson that touches quarks but not leptons is the gluon. The notes indicate that the gluon carries the strong nuclear force.

Statement 2: Z boson. Some bosons have a loop back to themselves, indicating that they can interact with other particles of precisely the same type. Which bosons do not have a loop back to themselves? Only two: photons and Z bosons, either of which would be possible answers.
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Re: Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink] New post 26 Aug 2012, 01:24
1. Glucon is connected only to quarks and not to leptons and force associates to Glocons is String Nuckear Force
2. Bossons which are not self connected: Photons and Z bosons. only Z boson is in the options.
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Re: Standard Model of Particle Physics - MGMAT - drop-down menu   [#permalink] 26 Aug 2012, 01:24
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