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

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Senior Manager
Affiliations: UWC
Joined: 09 May 2012
Posts: 393

Kudos [?]: 1661 [2], given: 100

GMAT 1: 620 Q42 V33
GMAT 2: 680 Q44 V38
GPA: 3.43
WE: Engineering (Entertainment and Sports)

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20 Aug 2012, 00:19
2
KUDOS
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 [ 31.65 KiB | Viewed 2077 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

Kudos [?]: 1661 [2], given: 100

Intern
Joined: 19 Dec 2011
Posts: 19

Kudos [?]: 10 [0], given: 37

Re: Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink]

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26 Aug 2012, 00:56
I got first one can anyone explain second question?

Kudos [?]: 10 [0], given: 37

Senior Manager
Affiliations: UWC
Joined: 09 May 2012
Posts: 393

Kudos [?]: 1661 [0], given: 100

GMAT 1: 620 Q42 V33
GMAT 2: 680 Q44 V38
GPA: 3.43
WE: Engineering (Entertainment and Sports)
Re: Standard Model of Particle Physics - MGMAT - drop-down menu [#permalink]

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26 Aug 2012, 01:21
dhirajdas53 wrote:
I got first one can anyone explain second question?

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]

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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.
_________________

"Appreciation is a wonderful thing. It makes what is excellent in others belong to us as well."
― Voltaire

Press Kudos, if I have helped.
Thanks!

Kudos [?]: 480 [0], given: 142

Re: Standard Model of Particle Physics - MGMAT - drop-down menu   [#permalink] 26 Aug 2012, 01:24
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# Standard Model of Particle Physics - MGMAT - drop-down menu

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