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Corina Marinescu

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Exotic particles with four or more quarks
Researchers at the LHC say they have discovered four new subatomic particles that are each made up of four quarks. Protons and neutrons are made of three quarks; lots of other particles are made of two. That's what makes the new "tetraquarks," and others like them that have been discovered recently, so strange. This article describes the six varieties of quarks and explains why they usually prefer to combine into pairs or triplets rather than quartets.

Read the article:
http://scitation.aip.org/content/aip/magazine/physicstoday/article/67/9/10.1063/PT.3.2525

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Conventional and exotic quark combinations.
(a) Three differently colored quarks form baryons such as the proton; three antiquarks combine to form antibaryons. Quarks couple with antiquarks of the corresponding anticolor in mesons such as the pion.

(b) Combining two quarks of different colors produces anticolored diquarks.

(c) Any number of quarks can combine to form a particle as long as the resulting color is white. Examples are pentaquark baryons, dibaryons, and tetraquark mesons. In such cases, “baryon” means that the number of quarks minus the number of antiquarks is three, and “meson” means that quarks and antiquarks appear in equal number.

Prefixes like “penta” or “tetra” refer to the total amount of quarks and antiquarks, without distinction. (d) In 2007 the Belle collaboration at KEK studied the reaction B → Kπ + ψ′. The plot here shows the invariant mass (defined in the text) of the π + ψ′ products; the peak indicates that those products arose from the decay of an intermediate Z meson, as illustrated in the inset, and the nature of the products suggests that the Z is a four-quark state.

#physics   #particles   #quarks   #science   #research  
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Oh, man, off to wikipedia to do some heavy reading.

EntirelyPets.com

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We needed some cuteness to get us through the week. #adorabledogs
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Very good love it

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Quote

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To celebrate #Heterosexualprideday, I found a map showcasing all the countries in which heterosexuality is legal. We're making progress!
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Hetraphobia is real people!!!
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you'll never be this cool
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Lol that's soooo fake lol
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NASA

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Curious about our Juno mission? Get the latest on the spacecraft and our new collaboration with Apple Music here: http://go.nasa.gov/29ekAsY
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👍
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Cooking Channel

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Beef with Broccoli is a takeout fave that takes only 10 minutes in a hot wok: http://www.cooktv.com/4tdj9. 
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nice meal, gona give it a trial
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Creative Ideas

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Kool Aid Cubes ~ Kids will get a kick out of this fun magic potion trick!

Please follow: +Creative Ideas 
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Hello guys
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Call of Duty

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No matter the odds, your crew sticks together to fight back. #InfiniteWarfare
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Yes but I still troll and snipe you close up
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Interesting Things

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I want one.. :)
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OK we'll spend forever in it! ;)
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BackintheUSA

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Winter in Times Square, 1947
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Fabulous 
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#Subhan_Allah






MA SHA ALLAH  Allah Akbar  ‏


The worst thing in the world isn t being alone, It s being surrounded by people that make you feel like you re alone.



*#Naruto #NarutoShippuden #NarutoUzumaki‏*‏ 

Naruto  NarutoShippuden NarutoUzumaki‏
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#Subhan_Allah






MA SHA ALLAH  Allah Akbar  ‏


The worst thing in the world isn t being alone, It s being surrounded by people that make you feel like you re alone.



*#Naruto #NarutoShippuden #NarutoUzumaki‏*‏ 

Naruto  NarutoShippuden NarutoUzumaki
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Riza Macing

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Know your value. Continue doing good things to others.. 
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Great advice !!
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Robyn Rihanna Fenty

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Riri spotted in London today! 💖💕😍
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So Cute 
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Barbara Maclean

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Istanbul. ..Turkey. 
Thinking about my dear friends over there
Stay safe♥♥♥
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Cantik sekali keindahannya
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Betty Carr

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Oh well!!
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My bff is like that
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sunny redcloud

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Celebration...   Native American Festival
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Part of America's history! 
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Mazda USA

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The #RXVision concept car brings an exciting future for Mazda. Design chief Ikuo Maeda tells us how he’s changing the game.

mzda.us/rxvision
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Wow....
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Health Benefits of Guava


Follow +Healthy and Diet Area

#health   #healthbenefits   #guava   #healthyliving  
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Words of Wisdom

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Please Follow:- +Words of Wisdom
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Thank you just smile needed that.
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