Dear Ray and Peter, I have to send my regrets for the meeting today - I'll be at a 'muon retreat' at the Lac de Joux and phone will not be possible. Have a good meeting. I should be OK for the following week. Sorry - -- Best regards, Frank Frank E. Taylor CERN MIT ATLAS Collaboration Bldg. 26 - Rm 569 188-3-015 77 Mass. Ave. Route de Meyrin 385, CH-1211 Geneva 23 Cambridge, MA 02139 Switzerland USA Office: +41-22-767-6373 Office: 617-253-7249 FAX: +41-22-767-8350 FAX: 617-258-6923 CELL: 781-484-8776 (USA & Europe) CERN CELL +41 76 487 3563 email: [log in to unmask] web: http://www2.lns.mit.edu/~fet/atlas_mit.html On Wed, 25 Jan 2012, Ray F. Cowan wrote: > Hi Frank, Peter, > > Never mind my earlier request. My appointment was just rescheduled > for another time by my doctor's office. So we are good to go as normal > for our LQS meeting tomorrow, January 26 at 2:00 PM. > > Sorry for the confusion. > > Thank you, > --Ray > > On Wed, 25 Jan 2012, Ray F. Cowan wrote: > > > Hi Frank, Peter, > > > > I've got a short doctors appointment at 2:00 PM Eastern tomorrow, so I > > wonder if we could meet at 2:30 PM Eastern instead of our usual 2:00 PM > > time slot? If that doesn't work, then you two can go ahead and meet > > at 2:00 PM as usual and I'll call in as soon as I get out of the > > appointment. Peter has the chair code if needed. > > > > Hopefully this week we'll finally get to discuss the new "exotic hadrons" result > > from Belle that Frank suggested. The paper is http://arxiv.org/abs/1110.2251, > > > > Dial-in is ReadyTalk 866-740-1260, code 3144955 at 2:30 PM Eastern (I hope). > > > > Thank you, > > --Ray > > > > ---------- Forwarded message ---------- > > Date: Tue, 10 Jan 2012 03:00:15 -0600 (CST) > > From: Interactions News Wire <[log in to unmask]> > > To: [log in to unmask] > > Subject: [Interactions News Wire] #02-12 - KEK: Belle Discovers New Heavy > > 'Exotic Hadrons' > > > > Interactions NewsWire #02-12 > > 10 January 2012 http://www.interactions.org > > ******************************************* > > Source: KEK > > Content: Press Release > > Date Issued: 10 January 2012 > > ******************************************* > > > > Belle Discovers New Heavy 'Exotic Hadrons' > > > > Two unexpected new hadrons containing bottom quarks have been discovered > > by the Belle Experiment using the High Energy Accelerator Research > > Organization (KEK)'s B Factory (KEKB), a highly-luminous, > > electron?positron collider. These new particles have electric charge and > > are thought to be "exotic" hadrons -- non-standard hadrons, containing at > > least four quarks. Previously, a series of new and unexpected exotic > > hadrons containing charm and anti-charm quarks have been observed. This > > latest discovery from Belle demonstrates the existence of exotic hadrons > > containing at least four quarks in a particle system including bottom > > quarks . > > > > The Belle Experiment has discovered two new unexpected particles at the > > KEK B Factory (KEKB). These new particles, termed Z(sub)b, contain both > > one 'bottom' quark (the second-heaviest quark among the known six types of > > quarks) and one 'anti-bottom' quark (the anti-particle of the bottom > > quark). Moreover, they have electric charge and thus are thought to be > > hadrons in which at least two additional quarks other than the bottom > > quark and anti-bottom quark (at least four quarks in total) are bound > > together. > > > > A large amount of data containing particles produced in electron?position > > collisions using the KEKB accelerator, which has achieved the world's > > highest luminosity, has been obtained. While focusing on 'bottomonia,' > > heavy mesons composed of one bottom quark and one anti-bottom quark, we > > conducted a detailed analysis of events involving two types of bottomonia, > > the Upsilon and the h(sub)b. This analysis revealed two new unanticipated > > charged particles that decay into a bottomonium (Upsilon or h(sub)b) and a > > charged pi meson (pi ±), which were then called "Z(sub)b(10610)" and > > "Z(sub)b(10650)" according to their mass values, 10610 and 10650 MeV/c^2, > > respectively. They are approximately eleven times heavier than a proton. > > In principle, a bottomonium particle?s charge is zero; therefore, these > > charged Z(sub)b particles should have at least two more quarks, e.g. one > > 'up' quark and one 'anti-down' quark. > > > > Several hundred mesons have been identified to date. All of them are > > thought to be bound states of one quark and one anti-quark, with the > > binding provided via the strong interaction of elementary particles. Using > > the KEKB accelerator, however, the Belle experiment has discovered more > > than ten 'exotic hadrons,' including the X(3872), Y(3940), and Z(4430), > > which were not anticipated by existing theories. These new particles, > > which are about 4?4.5 times heavier than a proton, may be exotic hadrons > > consisting of one 'charm' quark and one 'anti-charm' quark plus two more > > different types of lighter quarks. These unexpected discoveries have > > attracted the attention of researchers around the world. The latest > > discovery has revealed the existence of exotic hadrons containing bottom > > quarks, which are heavier than charm quarks. > > > > The Belle B Factory experiment, which began in 1999 with the aim of > > elucidating the origin of particle?anti-particle symmetry breaking (CP > > violation), has contributed to the Nobel Prize in Physics in 2008 awarded > > to Drs. Kobayashi and Maskawa. Moreover, data obtained from > > electron?positron collisions with the world's highest luminosity achieved > > at the KEKB accelerator have resulted in a series of unexpected > > discoveries of exotic hadrons, opening a new research frontier in particle > > physics. Data taking at the Belle Experiment has already been completed, > > but a vast amount of data is still awaiting detailed analysis. Moreover, > > an upgraded version of the KEKB/Belle Experiment, called SuperKEKB/Belle > > II is currently being prepared. Belle II aims to collect 50 times more > > data than the earlier experiment. Researchers are eagerly awaiting the > > opportunity to explore the full spectrum of exotic hadrons containing > > various types of quarks, including strange quarks, as well as charm and > > bottom quarks, which are expected to be discovered in the future at the > > SuperKEKB/Belle II Experiment. It is worth noting that quarks are bound by > > the strong interaction and confined to composite particles, such as > > mesons, and thus cannot exist individually as free particles. The detailed > > exploration of exotic hadrons will advance the understanding of how and > > what types of hadrons are possible based on the mechanisms defined by > > quantum chromodynamics, which describes the strong interaction. > > > > A paper reporting this achievement has been accepted for publication by > > Physical Review Letters on December 30, 2011, and will be published > > shortly. > > > > Full release, with images and glossary, is available at: > > http://www.kek.jp/intra-e/press/2012/011014/ > > > > Contact Information > > > > About the details of the present study > > Professor Yoshihide Sakai > > Co-spokesperson, the Belle Collaboration > > The High Energy Accelerator Research Organization > > TEL: 81-29-864-5335 > > FAX: 81-29-864-5340 > > E-mail: [log in to unmask] > > > > Professor Toru Iijima > > Co-spokesperson, the Belle Collaboration > > The Center for Experimental Studies, the Kobayashi?Maskawa Institute for > > the Origin of Particles and the Universe, Nagoya University > > TEL: 81-52-789-2893 > > FAX: 81-52-782-5752 > > E-mail: [log in to unmask] > > > > Professor Thomas Browder > > Co-spokesperson, the Belle Collaboration > > University of Hawaii > > TEL: 1-808-956-2936 > > FAX: 1-808-956-2930 > > E-mail: [log in to unmask] > > > > Public relations > > Yohei Morita > > Public Relations Officer > > The High Energy Accelerator Research Organization > > TEL: 81-29-879-6047 > > FAX: 81-29-879-6049 > > E-mail: [log in to unmask] > > > > To unsubscribe from the Interactions News Wire, please email [log in to unmask] with "remove" in the subject line.