<p>Dear Colleagues,
</p><p><br></p><p>Many of you know that the American Physical Society’s Division of Particles and Fields is conducting a major study of opportunities for the high-energy physics community ("Snowmass 2013" named after a similar exercise conducted in 2001). Its goal is to develop the community’s long-term physics aspirations and communicate these to the broader scientific community and to the US government.
</p><p><br></p><p>We are the conveners of the "New Light, Weakly-Coupled Particles" subgroup within the Intensity Frontier group. We will again consider the physics opportunities with axions, dark photons, chameleons, milli-charged particles etc. We are writing those of you who have expressed an interest in this physics in the past to tell you about our subgroup, encourage you to participate, and ask for your input. </p>
<p><br></p><p>The first "Community Planning Meeting (CPM2012)" for this study will be <b>this week at Fermilab, October 11-13, 2012</b> (call-in details for those unable to attend in person are given below):
</p><p><br></p><p><a href="https://indico.fnal.gov/conferenceDisplay.py?confId=5841">https://indico.fnal.gov/conferenceDisplay.py?confId=5841</a></p>
<p><br></p><p>Our group will have a session <b>this Friday at 10am--11:30am</b> Central Daylight Time. We will discuss what we want to achieve between now and the conclusion of the study in a two-week "Community Summer Study" at the University of Minnesota in Minneapolis, 7/29 - 8/10 2013:
</p><p><br></p><p><a href="http://www.snowmass2013.org/">http://www.snowmass2013.org/</a></p>
<p><br></p><p>We had a similar exercise last year that culminated in the Intensity Frontier Workshop. However, we now need to make an updated physics case to a much wider audience. It is anticipated that this long-term planning process will trigger an independent process of review and prioritization solicited by the funding agencies. So we again need to have a strong showing to educate our peers and the funding agencies about our group's physics goals. On Friday, we will discuss how to approach this. Your input will be valuable.
</p><p><br></p><p>Please let us know if you have any questions!
</p><p><br></p><p>Best regards,
</p><p><br></p><p>Rouven Essig, John Jaros, William Wester
</p><p><br></p><p>------------------------------
</p><p>A.) Call-in information:
</p><p><br></p><p>Those of you at Fermilab who want to attend the session on New Light, Weakly-Coupled Particles can meet in the Wormhole, WH6W. The nominal time is 10AM-11:30AM Fermilab time. For those who would like to connect by ReadyTalk, please call
</p><p><b><a href="tel:866-740-1260">866-740-1260</a> (US) </b></p><p>
or check the list of global toll-free numbers for non-US toll-free numbers:
</p><p><a href="http://www.readytalk.com/an.php?tfnum=8667401260">http://www.readytalk.com/an.php?tfnum=8667401260</a></p><p>
<b><br></b></p><p><b>Access code: 3426554</b></p><p><b><br></b></p>
<p>B.) Note that we will likely coordinate with a few Cosmic Frontier subgroups.
</p><p><br></p><p>C.) Apologies if you receive this message more than once; we have not yet made a single comprehensive email list. If you do not want to be on this email list, please send us an email, and we will remove you. </p>