The goal of this activity is to produce two outcomes in you, its participants. Our hope is that when finished, you will:

1. intellectually grasp the essentially collaborative, global, and computationally-assisted nature of large-scale eScience; and
2. value more the advancement of eScience as something that belongs to all human beings, including to each of you.

To assess the extent to which you've met those goals, we need to find particular things for you to do. For that, we need to specify the eScience. That's the significance of Particle Physics in this exercise: while we'd like you to learn and value physics (and expect some of that to happen through this exercise), our target isn't just physics (or more precisely particle physics), but science. More broadly, our target is the interrelated areas of science, technology, engineering, and mathematics, the so-callled STEM disciplines.

To enable you to show that you have achieved these two goals, we have designed this collaborative project with "scaffolding" to guide you to the accomplishment of two performance goals:

1) prepare an overview of the collaborative process of event filtering using J/Psi event displays, which will illustrate these enduring
understandings in the context of doing particle physics; and

2) invest in a detailed public explanation of this collaborative project by presenting your account online and perhaps elsewhere.

You will accomplish both of these goals through the creation of online posters, each developed by small groups. In the process of working through the creation of this poster, you'll learn a good deal about particle physics as an example of eScience, and you'll contribute to the advancement of a community that understands and values particle physics and (more generally) eScience.

Your posters will be created in the CMS e-Lab. The e-Lab supports poster creation by providing materials to enable you to ask and answer research questions of real particle physics data. The question you'll come to understand and then answer together in this exercise is this: can we better determine the mass of a particular short-lived particle--called the J/Psi particle--by carefully distinguishing between (=filtering, or cutting) events of higher quality from lower quality signatures of its decay products?

Huh? Don't worry...we'll provide the help you need to get started, step-by-step, organized to help you write each section of the poster.

In the poster intro you''ll be prompted to explain the significance of this cutting: the particle physics context, the anatomy of the detector represented in the event displays, the physics behind the cuts you've made and the plots (called invariant mass plots) you've produced to show your results;

In the procedure section, you will describe your use of the single event display tool, the way they filter for muon quality, the number of events assigned to each group member, the input system to accumulate data, and the creation of the invariant mass plots associated with before and after the application of the filtering process;

In the results section, you'll present those invariant mass plots, both before and after you've made the cuts on the J/Psi dataset;

In the discussion section, you'll explain the meaning of the results you've worked together to achieve, set those results back in the context of the physics which scientists are using the LHC collider and the CMS detector to explore, and discuss your confidence level in the results as well as next steps which could be taken to increase that confidence and/or move a next step closer to broader physics goals.