0:00:06.547,0:00:07.415 Without a doubt, 0:00:07.415,0:00:10.174 the most exciting scientific observation of 2012 0:00:10.174,0:00:12.087 was the discovery of a new particle 0:00:12.087,0:00:13.147 at the CERN laboratory 0:00:13.147,0:00:15.206 that could be the Higgs boson, 0:00:15.206,0:00:18.620 a particle named after physicist Peter Higgs. 0:00:18.620,0:00:19.876 The Higgs Field is thought to give mass 0:00:19.876,0:00:21.592 to fundamental, subatomic particles 0:00:21.592,0:00:22.471 like the quarks 0:00:22.471,0:00:23.053 and leptons 0:00:23.053,0:00:24.955 that make up ordinary matter. 0:00:24.955,0:00:27.551 The Higgs bosons are wiggles in the field, 0:00:27.551,0:00:28.435 like the bump you see 0:00:28.435,0:00:29.937 when you twitch a rope. 0:00:29.937,0:00:32.662 But how does this field give mass to particles? 0:00:32.662,0:00:34.440 If this sounds confusing to you, 0:00:34.440,0:00:35.682 you're not alone. 0:00:35.682,0:00:38.386 In 1993, the British Science Minister 0:00:38.386,0:00:40.715 challenged physicists to invent a simple way 0:00:40.715,0:00:42.728 to understand all this Higgs stuff. 0:00:42.728,0:00:45.192 The prize was a bottle of quality champagne. 0:00:45.192,0:00:47.810 The winning explanation went something like this: 0:00:47.810,0:00:49.698 Suppose there's a large cocktail party 0:00:49.698,0:00:50.730 at the CERN laboratory 0:00:50.730,0:00:53.323 filled with particle physics researchers. 0:00:53.323,0:00:56.418 This crowd of physicists represents the Higgs field. 0:00:56.418,0:00:58.660 If a tax collector entered the party, 0:00:58.660,0:01:00.008 nobody would want to talk to them, 0:01:00.008,0:01:01.969 and they could very easily cross the room 0:01:01.969,0:01:03.264 to get to the bar. 0:01:03.264,0:01:05.503 The tax collector wouldn't interact with the crowd 0:01:05.503,0:01:06.807 in much the same way 0:01:06.807,0:01:09.641 that some particles don't interact with the Higgs field. 0:01:09.641,0:01:11.212 The particles that don't interact, 0:01:11.212,0:01:12.897 like photons for example, 0:01:12.897,0:01:14.441 are called massless. 0:01:14.441,0:01:17.186 Now, suppose that Peter Higgs entered the same room, 0:01:17.186,0:01:19.030 perhaps in search of a pint. 0:01:19.030,0:01:20.092 In this case, the physicists 0:01:20.092,0:01:22.022 will immediately crowd around Higgs 0:01:22.022,0:01:23.155 to discuss with him 0:01:23.155,0:01:24.862 their efforts to measure the properties 0:01:24.862,0:01:26.566 of his namesake boson. 0:01:26.566,0:01:28.763 Because he interacts strongly with the crowd, 0:01:28.763,0:01:30.930 Higgs will move slowly across the room. 0:01:30.930,0:01:32.194 Continuing our analogy, 0:01:32.194,0:01:33.926 Higgs has become a massive particle 0:01:33.926,0:01:36.039 through his interactions with the field. 0:01:36.039,0:01:37.948 So, if that's the Higgs field, 0:01:37.948,0:01:40.320 how does the Higgs boson fit into all of this? 0:01:40.320,0:01:42.177 Let's pretend our crowd of party goers 0:01:42.177,0:01:44.552 is uniformly spread across the room. 0:01:44.552,0:01:46.957 Now suppose someone pops their head in the door 0:01:46.957,0:01:48.342 to report a rumor of a discovery 0:01:48.342,0:01:50.677 at some distant, rival laboratory. 0:01:50.677,0:01:52.673 People near the door will hear the rumor, 0:01:52.673,0:01:54.258 but people far away won't, 0:01:54.258,0:01:56.138 so they'll move closer to the door to ask. 0:01:56.138,0:01:58.297 This will create a clump in the crowd. 0:01:58.297,0:01:59.846 As people have heard the rumor, 0:01:59.846,0:02:01.258 they will return to their original positions 0:02:01.258,0:02:03.120 to discuss its implications, 0:02:03.120,0:02:06.178 but people further away will then ask what's going on. 0:02:06.178,0:02:08.067 The result will be a clump in the crowd 0:02:08.067,0:02:09.758 that moves across the room. 0:02:09.758,0:02:12.534 This clump is analogous to the Higgs boson. 0:02:12.534,0:02:13.763 It is important to remember 0:02:13.763,0:02:15.623 that it is not that massive particles 0:02:15.623,0:02:17.372 interact more with the Higgs field. 0:02:17.372,0:02:18.906 In our analogy of the party, 0:02:18.906,0:02:21.676 all particles are equal until they enter the room. 0:02:21.676,0:02:24.620 Both Peter Higgs and the tax collector have zero mass. 0:02:24.620,0:02:26.512 It is the interaction with the crowd 0:02:26.512,0:02:28.591 that causes them to gain mass. 0:02:28.591,0:02:29.990 I'll say that again. 0:02:29.990,0:02:33.036 Mass comes from interactions with a field. 0:02:33.036,0:02:34.488 So, let's recap. 0:02:34.488,0:02:36.298 A particle gets more or less mass 0:02:36.298,0:02:38.126 depending on how it interacts with a field, 0:02:38.126,0:02:40.258 just like different people will move through the crowd 0:02:40.258,0:02:43.940 at different speeds depending on their popularity. 0:02:43.940,0:02:45.033 And the Higgs boson is just a clump in the field, 0:02:45.033,0:02:47.097 like a rumor crossing the room. 0:02:47.097,0:02:48.945 Of course, this analogy is just that -- 0:02:48.945,0:02:50.165 an analogy, 0:02:50.165,0:02:51.315 but it's the best analogy 0:02:51.315,0:02:53.118 anyone has come up with so far. 0:02:53.118,0:02:54.310 So, that's it. 0:02:54.310,0:02:55.171 That's what the Higgs Field 0:02:55.171,0:02:57.277 and the Higgs boson is all about. 0:02:57.277,0:02:59.418 Continuing research will tell us if we found it, 0:02:59.418,0:03:01.176 and the reward will probably be more 0:03:01.176,0:03:03.543 than just a bottle of champagne.