WEBVTT 1 00:00:04.470 --> 00:00:08.940 Matthew Bellis: We should be recording now perfect all right, let me get my screen up. 2 00:00:08.940 --> 00:00:09.420 again. 3 00:00:13.500 --> 00:00:16.890 And the participants in the chat okay. 4 00:00:19.410 --> 00:00:22.590 Julie Hogan: All right, so this is our This is our second hands on exercise. 5 00:00:23.940 --> 00:00:37.200 Julie Hogan: And what I want to do before we start, I want to show you the roadmap what we're going to do in this session, and I want to show you the output of running poets. 6 00:00:38.280 --> 00:00:47.760 Julie Hogan: So what we have on the lesson page right here in the hands on exercise, there are four exercises. 7 00:00:49.380 --> 00:01:00.090 Julie Hogan: And i'm hoping that, in this actual 40 minutes, right now, you could do, one of the options market exercise one and you could do exercise too. 8 00:01:01.590 --> 00:01:04.200 Julie Hogan: So the others are there, you can always come back to them. 9 00:01:05.250 --> 00:01:15.840 Julie Hogan: The first three options are all related to object identification one for nuance one for towels one for jets so pick your favorite. 10 00:01:16.920 --> 00:01:23.760 Julie Hogan: pick your favorite and we can dig into the identification algorithms for those objects, a little bit more. 11 00:01:24.870 --> 00:01:31.590 Julie Hogan: For each one of these when you start exercise one I encourage you to go back to the lesson page on that object. 12 00:01:32.760 --> 00:01:46.020 Julie Hogan: And we have some tricky links that we looked at on those pages to the cms this to the cms reference pages that have some of the information you need to pull out to do these exercises. 13 00:01:47.100 --> 00:01:54.570 Julie Hogan: And the last exercise will look at the missing energy which we which we talked about super briefly so we'll look at that a little bit more. 14 00:01:55.560 --> 00:02:05.880 Julie Hogan: There are already solutions posted no fair peaking try to avoid hitting that button will go over them together, though, right at the end of the session 15 00:02:07.020 --> 00:02:07.470 Julie Hogan: So. 16 00:02:08.730 --> 00:02:11.970 Julie Hogan: that's their over here in my container. 17 00:02:12.990 --> 00:02:21.300 Julie Hogan: over here my container my poet that I that I cloned at the beginning of last time and then I set running finished. 18 00:02:22.230 --> 00:02:33.750 Julie Hogan: So you might see messages similar to this if you had a failure, please let people know in matter most so we'll try to work that through with you but fingers crossed yours looks similar to mine. 19 00:02:34.950 --> 00:02:42.180 Julie Hogan: And so you see some some messages being print out and then you might see comment might see what look like errors like this. 20 00:02:43.860 --> 00:02:54.030 Julie Hogan: You know can't access my my proxy, which is actually Okay, because this is public data, and so we don't require such a thing as a network authentication. 21 00:02:54.690 --> 00:03:03.810 Julie Hogan: So, but it's still tells us that it can't find it so we have opening this file initiating a request to open the file successfully open the file. 22 00:03:04.950 --> 00:03:17.040 Julie Hogan: print out from the code itself and then close the file that set of messages means it worked and then typically you'll have a summary at the bottom like this. 23 00:03:18.570 --> 00:03:28.620 Julie Hogan: In this case, it's a very boring summary that's telling me there were some open and some close actions, if you see the word fatal exception show up in here, something went wrong. 24 00:03:30.750 --> 00:03:33.960 Julie Hogan: So that's that's the overview and what we have. 25 00:03:35.490 --> 00:03:43.620 Julie Hogan: New in our folder here at 1717 when this stopped running, I have a root file called my output. 26 00:03:45.870 --> 00:03:48.990 Julie Hogan: So I am going to remember that i'm using windows. 27 00:03:50.940 --> 00:03:56.610 Julie Hogan: and start my V and see so that I can show you what this. 28 00:03:58.020 --> 00:03:59.250 Julie Hogan: file contains. 29 00:04:03.390 --> 00:04:05.790 Julie Hogan: And I have to move all of my zoom stuff. 30 00:04:07.320 --> 00:04:09.060 Julie Hogan: Which is in the way okay there we go. 31 00:04:17.850 --> 00:04:18.150 Okay. 32 00:04:21.060 --> 00:04:23.340 Julie Hogan: So here's my here's my B and C, you are. 33 00:04:25.530 --> 00:04:26.040 Very large. 34 00:04:31.980 --> 00:04:32.220 Julie Hogan: Okay. 35 00:04:36.330 --> 00:04:43.410 Julie Hogan: And in here, I can actually open with a route this file and if you're new to route. 36 00:04:44.550 --> 00:04:48.900 Julie Hogan: If you're new to route, the first the first good thing to do is is always open the browser. 37 00:04:50.580 --> 00:04:57.060 Julie Hogan: Some of the exercises in here i've given you some command line instructions which some of you may may or may not. 38 00:04:58.800 --> 00:05:01.410 Julie Hogan: So we can investigate what lives inside our file. 39 00:05:02.430 --> 00:05:04.860 Julie Hogan: Every ED analyzer has made a folder. 40 00:05:06.570 --> 00:05:18.270 Julie Hogan: The electrons live in one folder and they have a tree you learned a little bit in some of the pre exercises about trees and branches, and so we can draw their quantities by clicking. 41 00:05:20.280 --> 00:05:25.170 Julie Hogan: on it, so we could see, for instance, whether these electrons are loose or medium. 42 00:05:26.490 --> 00:05:27.300 or tight. 43 00:05:29.460 --> 00:05:31.890 Julie Hogan: We can look at the other objects jets. 44 00:05:35.790 --> 00:05:44.730 Julie Hogan: Mass momentum etc so that's the basic structure you expect from one of these files, if you are able to run this successful. 45 00:05:46.170 --> 00:06:06.420 Julie Hogan: So take a shot at one of these exercises choose an identification algorithm challenge for yourself and see see how you can do with looking up information on these cookies i'm going to do i'm going to do, while we, while we sit here and work i'm going to do exercise one option A. 46 00:06:07.500 --> 00:06:09.600 Julie Hogan: house, so you can follow, along with me if you prefer. 47 00:06:33.030 --> 00:06:37.980 Julie Hogan: You can always feel free to raise hands as questions in the zoom chat ask questions in the matter most. 48 00:07:19.110 --> 00:07:23.850 Matthew Bellis: Actually, I have a question at the risk of interrupting your your editing. 49 00:07:24.150 --> 00:07:24.630 that's fine. 50 00:07:25.710 --> 00:07:29.310 Matthew Bellis: So I was looking at the the output from the poet file. 51 00:07:29.910 --> 00:07:32.430 Matthew Bellis: Okay, and that my output dot route. 52 00:07:33.660 --> 00:07:43.590 Matthew Bellis: And right there's a bunch of T directory files and each one of those T directory files has like a tree structure with the entries. 53 00:07:44.340 --> 00:07:56.370 Matthew Bellis: yep so let's suppose I want to now analyze this and i'm looping over events, and I want to make some selection on jets and towels and. 54 00:07:57.510 --> 00:07:58.680 Matthew Bellis: electrons. 55 00:07:59.700 --> 00:08:02.250 Matthew Bellis: Right, so I want to rewrite some event process or. 56 00:08:03.360 --> 00:08:05.880 Matthew Bellis: Do I have to basically open up a bunch of. 57 00:08:07.110 --> 00:08:15.960 Matthew Bellis: trees and then kind of like soup over the manually or is there an easier way that i've missed maybe in in the pre exercise that I. 58 00:08:17.310 --> 00:08:21.690 Julie Hogan: So we actually have a couple of tools setup for this, let me show you. 59 00:08:25.080 --> 00:08:30.780 Julie Hogan: So in the physics object extractor tool we have a folder over here called test. 60 00:08:31.290 --> 00:08:36.480 Julie Hogan: uh huh and test is holding a couple of little analysis examples. 61 00:08:37.920 --> 00:08:44.040 Julie Hogan: That would let you do this so i'll just show you the event loop analysis template quickly. 62 00:08:45.240 --> 00:08:55.290 Julie Hogan: And what we can do with these different trees, the the root terminology is that we can they are friends of each other, we can be friends. 63 00:08:56.280 --> 00:09:08.940 Julie Hogan: And when so so we can make make a friendship and we can add friend trees, so this little script when you when you get into those type of questions can. 64 00:09:10.290 --> 00:09:12.750 Julie Hogan: navigate using multiple trees that one's. 65 00:09:13.140 --> 00:09:14.460 Matthew Bellis: got it alright thanks. 66 00:09:16.650 --> 00:09:17.160 Matthew Bellis: Good question. 67 00:09:45.270 --> 00:09:49.440 Julie Hogan: Okay, we did I got Jamie is or him as your question. 68 00:09:52.020 --> 00:09:57.390 Julie Hogan: In matter most this This to me looks like a docker container error. 69 00:09:59.160 --> 00:10:08.760 Julie Hogan: This looks like a problem accessing the databases so i'm going to hand that to get to your advert or more expert on that, though perhaps. 70 00:10:19.590 --> 00:10:21.480 Edgar Fernando Carrera Jarrin: Okay, every time you see this. 71 00:10:23.730 --> 00:10:24.720 Edgar Fernando Carrera Jarrin: Global tag. 72 00:10:28.320 --> 00:10:33.120 Edgar Fernando Carrera Jarrin: message, it has to do something with accessing the. 73 00:10:34.950 --> 00:10:37.350 Edgar Fernando Carrera Jarrin: The database information. 74 00:10:38.790 --> 00:10:40.110 Edgar Fernando Carrera Jarrin: So. 75 00:10:41.280 --> 00:10:46.830 Edgar Fernando Carrera Jarrin: What kind of a so you are using a container or virtual machine. 76 00:10:56.730 --> 00:10:59.010 Edgar Fernando Carrera Jarrin: Okay, a container and. 77 00:11:00.060 --> 00:11:03.360 Edgar Fernando Carrera Jarrin: So the container has its own. 78 00:11:05.190 --> 00:11:17.550 Edgar Fernando Carrera Jarrin: database yeah its own database directory let's say, and if you go to the poet Julie, maybe you can show the poet configuration file there. 79 00:11:19.470 --> 00:11:29.400 Edgar Fernando Carrera Jarrin: There are a couple of our yeah so one thing that you should probably do in order to run is to change. 80 00:11:30.030 --> 00:11:41.340 Edgar Fernando Carrera Jarrin: And we went through this during the trigger lesson, but if you can see, at the global tag section bit below right, so you have those still lines. 81 00:11:41.790 --> 00:11:53.580 Edgar Fernando Carrera Jarrin: With this conditional right and it's loading the global tech, well, it turns out that you, you really have to come and out these two lines and then on comment now the ones below. 82 00:11:55.710 --> 00:11:56.100 Right. 83 00:11:58.920 --> 00:12:07.710 Edgar Fernando Carrera Jarrin: And then you have to comment, the lines with the local conditions I don't know if you can you can see that Julie. 84 00:12:08.070 --> 00:12:08.490 Edgar Fernando Carrera Jarrin: they're not. 85 00:12:09.210 --> 00:12:09.690 Edgar Fernando Carrera Jarrin: Using. 86 00:12:10.260 --> 00:12:12.450 Julie Hogan: This line and comment on these lines. 87 00:12:13.380 --> 00:12:25.980 Edgar Fernando Carrera Jarrin: Now those those first two lines are fine right, but then, when you get to the conditional if if this data thing you know where you get a good level of tax those two lines have have to be commended out. 88 00:12:27.450 --> 00:12:34.380 Edgar Fernando Carrera Jarrin: In the ones below yeah right there, they have to be uncommitted The difference is that. 89 00:12:36.870 --> 00:12:41.130 Edgar Fernando Carrera Jarrin: With the first option, you are trying to access these conditions. 90 00:12:42.510 --> 00:12:43.440 Edgar Fernando Carrera Jarrin: Not locally. 91 00:12:45.420 --> 00:12:46.050 Edgar Fernando Carrera Jarrin: and 92 00:12:47.430 --> 00:12:49.200 Edgar Fernando Carrera Jarrin: It shouldn't have failed actually. 93 00:12:50.400 --> 00:12:50.790 Edgar Fernando Carrera Jarrin: But. 94 00:12:52.140 --> 00:12:58.380 Edgar Fernando Carrera Jarrin: It could actually run quicker if you uncommon is his lines, instead of the previous two words. 95 00:12:58.620 --> 00:13:03.450 Julie Hogan: Okay, so that's the trial case perhaps comments these than uncommon these. 96 00:13:52.680 --> 00:13:55.440 Edgar Fernando Carrera Jarrin: and actually if I look at the air, it may. 97 00:13:56.850 --> 00:14:13.530 Edgar Fernando Carrera Jarrin: It may be saying that too many people are trying to connect to the servers at the same time, and so that's why it is important to use the local the local configuration, in that way we don't hit cms databases servers 12. 98 00:14:14.550 --> 00:14:16.800 Julie Hogan: So then, what I will go ahead and. 99 00:14:19.020 --> 00:14:19.920 Julie Hogan: edit that. 100 00:14:21.630 --> 00:14:26.130 Julie Hogan: One of the reasons why we wouldn't have set that up as the default is that. 101 00:14:27.360 --> 00:14:34.260 Julie Hogan: For this, for this workshop we have this container with these things stored locally, but you know if you are using. 102 00:14:35.790 --> 00:14:42.750 Julie Hogan: Perhaps different container just for your analysis may need to access them over the over the network. 103 00:18:02.520 --> 00:18:14.910 Julie Hogan: Okay we're almost halfway through this time so i'm going to move on to looking at exercise to you're welcome to keep continuing on one exercise one or, if you want to pause that. 104 00:18:16.470 --> 00:18:29.700 Julie Hogan: and move on, you can try exercise so i'm going to I made a few changes to the one analyzer which i'm going to attempt to comply with see how lucky I got my typing first time around. 105 00:18:31.650 --> 00:18:33.360 not completely perfect missing. 106 00:18:34.380 --> 00:18:35.100 parentheses. 107 00:20:13.080 --> 00:20:14.670 Julie Hogan: Edgar it doesn't seem quite happy. 108 00:21:04.080 --> 00:21:21.210 Julie Hogan: Okay, I apologize, I must not have had the very most updated container because this one i've used for a while, for development, so I hope that this is will work for for many of you who have freshly done the pre exercise I don't know if you're not the right access to these. 109 00:21:22.890 --> 00:21:25.620 Julie Hogan: Local files so i'm going to go back to the. 110 00:21:27.330 --> 00:21:28.080 person here. 111 00:21:31.680 --> 00:21:33.480 And i'll try to fix up before the next time. 112 00:22:17.850 --> 00:22:22.770 Julie Hogan: Something i'm realizing is that I have not given you, I think the second route file. 113 00:22:23.820 --> 00:22:35.130 Julie Hogan: I meant to go and put that as a as an option we put config and I think that's missing so i'll post them matter most in case anyone gets to that point and would like to try a different. 114 00:22:36.390 --> 00:22:37.980 Monaco sample file. 115 00:24:31.260 --> 00:24:35.760 Julie Hogan: So here's how I might put this temporary second file in. 116 00:24:37.980 --> 00:24:41.430 I wanted to run a different simulation. 117 00:24:42.960 --> 00:24:43.440 Julie Hogan: file. 118 00:28:49.980 --> 00:28:57.120 Julie Hogan: Okay i'd like to take the last 10 minutes here of our of our time together to go over some of these solutions. 119 00:28:59.460 --> 00:29:11.670 Julie Hogan: So the first three exercises that are all related to identification are prompting you to go to these reference pages so for for new ones i've got it pulled up here. 120 00:29:13.890 --> 00:29:18.660 Julie Hogan: And for towels we have a couple of a reference pages. 121 00:29:20.130 --> 00:29:22.920 Julie Hogan: as well, and for jets. 122 00:29:24.810 --> 00:29:32.640 Julie Hogan: I had pointed you to this folder, which is actually in the github repository of cms system for you. 123 00:29:35.130 --> 00:29:43.500 Julie Hogan: So that we can look at all the methods available for for jets which live which live in here. 124 00:29:44.700 --> 00:29:48.930 Julie Hogan: In the folder called interface, where all the header files live. 125 00:29:50.220 --> 00:29:51.840 Julie Hogan: And then the file called jet. 126 00:29:53.100 --> 00:29:56.940 Julie Hogan: So these are three reference pages will look at immediately. 127 00:29:59.490 --> 00:30:00.570 Julie Hogan: For nuance. 128 00:30:03.270 --> 00:30:14.820 Julie Hogan: The isolation code that we had put in up that we had by default here in the extractor tool and we collect the analyzer does not have that pilot correction on it. 129 00:30:17.760 --> 00:30:19.080 Julie Hogan: And so we can add it in. 130 00:30:21.060 --> 00:30:23.790 Julie Hogan: Here we go, so we just had the basic. 131 00:30:25.020 --> 00:30:31.650 Julie Hogan: charge have drones and neutral have drones and photons, and so it is tricky here. 132 00:30:32.820 --> 00:30:35.310 Julie Hogan: For nuance walk you through the different. 133 00:30:37.080 --> 00:30:45.090 Julie Hogan: The different ids identification algorithms that exist and then here's a link to isolation information. 134 00:30:47.370 --> 00:30:50.010 Julie Hogan: And so from this from this. 135 00:30:51.030 --> 00:30:53.130 Julie Hogan: table right here what I see. 136 00:30:54.210 --> 00:31:07.860 Julie Hogan: Is that the recommendation is to use the code size of 0.4 I can see that I should be using this delta beta correction which is described here in this section below. 137 00:31:10.290 --> 00:31:10.920 Julie Hogan: and 138 00:31:12.060 --> 00:31:16.200 Julie Hogan: So I can look I can look that up here's some information about the. 139 00:31:16.860 --> 00:31:34.200 Julie Hogan: Isolation structure and what options that contains we're already using some of them already using some charge cards on neutral some zero hedge on some photon and here's the configuration that it suggests that to us, and so I can implement that. 140 00:31:35.250 --> 00:31:38.460 Julie Hogan: In my see oh good the sky finished. 141 00:31:44.100 --> 00:31:48.990 Julie Hogan: So what i've done really quickly right here is i've added in this. 142 00:31:50.130 --> 00:32:03.120 Julie Hogan: idea of a maximum to protect my subtraction from going negative and i've added here the minus 0.5 times this some pilot. 143 00:32:05.580 --> 00:32:09.780 Julie Hogan: So you can find some of these pieces of information here on the on the twitters. 144 00:32:11.880 --> 00:32:27.360 Julie Hogan: Similar for implementing the loose ID, which was the second ask it tells me how to do that, and so I I can add it to my to my code here, following the example of the other ideas that were already in place. 145 00:32:29.490 --> 00:32:39.420 Julie Hogan: And the last little bit of this of this exercise was suggesting that you can rebuild, you can try to recreate, these are the working points from the detector information. 146 00:32:39.960 --> 00:33:01.080 Julie Hogan: Because it's all here on this wiki page in the tables for each ID or all of the actual cuts that go into each one of them, so this tight new on ID has has many requirements on detector conditions that go into building this identification criteria. 147 00:33:03.390 --> 00:33:20.760 Julie Hogan: So you could you could build that up and if you walk through this solution, you you i've tried to point out all the pieces, you would need to touch in this file to have access to some branches, which hopefully now if I open one of my route files. 148 00:33:22.230 --> 00:33:28.050 Julie Hogan: I have access to, so I could go and look in the view on folder. 149 00:33:35.100 --> 00:33:36.420 Julie Hogan: In my events tree. 150 00:33:38.160 --> 00:33:45.690 Julie Hogan: And i've got, for instance here my new branch that I just created the loose ID which is either zero or one. 151 00:33:46.950 --> 00:33:56.790 Julie Hogan: And if I compare that to tight I do what I expect is that loose has more ones and tight ID has your ones here my stuff's boxes in the way to get rid of it. 152 00:33:58.680 --> 00:33:58.890 going. 153 00:34:02.490 --> 00:34:03.360 Julie Hogan: So compared. 154 00:34:05.940 --> 00:34:07.770 Julie Hogan: Comparing loose it. 155 00:34:08.970 --> 00:34:10.110 Julie Hogan: And tight ID. 156 00:34:11.850 --> 00:34:20.310 Julie Hogan: We have many well you can't win this this box, we have, we have a harsher criteria here and tidy them you did it. 157 00:34:23.760 --> 00:34:24.030 Okay. 158 00:34:26.190 --> 00:34:29.460 Julie Hogan: For the towel exercise a little bit similar. 159 00:34:30.540 --> 00:34:44.610 Julie Hogan: There are many discriminates, and so I prompted you to try to find an add some values that are based on nba techniques and in this town wiki page they lay out all of their algorithms. 160 00:34:45.630 --> 00:34:48.420 Julie Hogan: With some information on how to use them. 161 00:34:49.950 --> 00:34:56.280 Julie Hogan: So there are several for left on rejection like like saying this was this was actually an electron rather little towel. 162 00:34:57.330 --> 00:35:01.110 Julie Hogan: There are some from you on rejection, this was actually a new on not a towel. 163 00:35:02.760 --> 00:35:06.180 Julie Hogan: There are some kind of basic isolation. 164 00:35:07.380 --> 00:35:15.210 Julie Hogan: related metrics on these house and then here at the bottom of the list are some that are related to mbas. 165 00:35:16.230 --> 00:35:26.790 Julie Hogan: And so I chose to in the solution if you take a peek at it now I choose to use this MBA number two because it says MBA number two in the training and improve performance, so that sounds great. 166 00:35:29.670 --> 00:35:35.430 Julie Hogan: So what we can do is a similar process of adding a couple of variables. 167 00:35:36.630 --> 00:35:38.520 Julie Hogan: And some branches, to the tree. 168 00:35:39.720 --> 00:35:45.690 Julie Hogan: and open TAO collections very similar to how all the other ones are done in the file. 169 00:35:46.740 --> 00:36:02.820 Julie Hogan: And then we can access their information, so this is kind of a template type exercise where you have an example of how five or six of these are done and could look up others and on this wiki page it might help you decide which ones, you want to use analysis. 170 00:36:08.880 --> 00:36:27.450 Julie Hogan: For the for the exercise we can learn in this in this jet header file all of the Member functions that we need to complete this criteria that we saw in the lesson page so here in the lesson page. 171 00:36:30.390 --> 00:36:48.570 Julie Hogan: Here in the in the lesson page is a quotation from a paper that describes what the large hadron fraction should be the neutral hadron fraction the charged electron electromagnetic fraction, so there are these poor conditions that are described in this paper. 172 00:36:50.310 --> 00:37:04.440 Julie Hogan: And so, by looking up by looking up this reference information, even just in cms this w in the code, we can find a set of number functions that allow us to calculate those quantities. 173 00:37:05.640 --> 00:37:10.800 Julie Hogan: And so you could apply that to all of the jets as you analyze them. 174 00:37:21.060 --> 00:37:38.220 Julie Hogan: The second exercise is mostly to make sure everyone can run poet so thanks for everyone who would found us some of arts settings to change here on the on the matter most hopefully you were able to run and if you were not able to run please definitely, let us know. 175 00:37:39.720 --> 00:37:54.120 Julie Hogan: We can we can run on different on different route files and as we process different samples, we expect them to have different physics, so I wanted to show you all, an example of looking at missing energy. 176 00:37:55.350 --> 00:37:56.640 Julie Hogan: In two different samples. 177 00:37:58.590 --> 00:38:09.810 Julie Hogan: One of which top court pairs, one of which could actually have events with neutrinos and them, which would create what we would consider real missing energy. 178 00:38:11.040 --> 00:38:25.830 Julie Hogan: The other sample that we process which I pasted here in the in the matter most is labeled dui jets to ll so drill yan plus perhaps jeff's to to leptons is the main code here. 179 00:38:26.640 --> 00:38:47.370 Julie Hogan: And the fact that this drill yam process disease photons the fact that they're producing to leptons indicates that we don't expect any neutrinos in this process and so any missing energy we find is related only to miss measurements of detector objects. 180 00:38:48.540 --> 00:39:03.900 Julie Hogan: And so, hopefully you're able to come back and kind of go through some of these i've tried to show you how you could draw two histograms on top of each other quickly, which is a handy tool and we'll use that later in tomorrow's exercises. 181 00:39:04.920 --> 00:39:23.190 Julie Hogan: But just to give you an idea how it looks like here in the blue line is a is a an example of missing energy that's not real it's from this measurement or resolution effects and the numerical values in G here can actually be quite large. 182 00:39:24.450 --> 00:39:34.140 Julie Hogan: But you can see that, of course, the Red distribution for top Cork events has a much larger need because here we could actually have some real missing energy. 183 00:39:37.080 --> 00:39:47.490 Julie Hogan: And we also have a significance metric for missing energy which gives you an idea in terms of here in number number of standard deviations rather than. 184 00:39:48.180 --> 00:40:05.730 Julie Hogan: Giving electron volts so this gives you an idea of the significance of that missing energy value and again the top part red bar has it has a higher value and tends to have more significant missing energy, as well as just more in general. 185 00:40:07.650 --> 00:40:18.270 Julie Hogan: So this is giving you a first quick look at some of the identification algorithms we've tried to put the most commonly used ones, already in the physics object extractor tool. 186 00:40:18.870 --> 00:40:37.950 Julie Hogan: But you have access to the cms public reference pages that can help you if, if one of you want something perhaps that is more appropriate for your analysis, you can implement other things that have been developed by cms or learn about the detector criteria that went into them. 187 00:40:39.060 --> 00:40:42.600 Julie Hogan: And you can run poet, hopefully, you all got to. 188 00:40:43.800 --> 00:40:48.330 Julie Hogan: Use One example that successfully and investigate the output in the tree. 189 00:40:49.620 --> 00:41:09.510 Julie Hogan: So that's our first day we're happy to hang out for a little while here on matter most and maybe been on zoom for four more minutes here answering questions and then I think you're headed into the challenge exercise for let's let's take a peek at what the offline. 190 00:41:11.340 --> 00:41:15.300 Julie Hogan: The offline exercises are before tomorrow. 191 00:41:16.560 --> 00:41:26.790 Julie Hogan: There we go the challenge for data sets and access and then there's one lesson page to read ahead for tomorrow's advanced physics object lesson. 192 00:41:30.930 --> 00:41:36.960 Edgar Fernando Carrera Jarrin: So this prep work is just the first the first episode in the next lesson right. 193 00:41:36.990 --> 00:41:38.490 Julie Hogan: that's right oh go ahead and click. 194 00:41:40.110 --> 00:41:42.390 Julie Hogan: you're headed only to the one mark. 195 00:41:42.480 --> 00:41:42.780 prep. 196 00:41:44.730 --> 00:41:46.440 Julie Hogan: Everything else will get tomorrow. 197 00:41:53.310 --> 00:41:53.850 Julie Hogan: Alright, thanks. 198 00:41:54.030 --> 00:41:55.320 Edgar Fernando Carrera Jarrin: Thank you very much Julie. 199 00:41:59.010 --> 00:42:01.980 Edgar Fernando Carrera Jarrin: And thanks everyone see you tomorrow. 200 00:42:04.890 --> 00:42:06.270 Matthew Bellis: bye everybody, thank you for.