Summary of the low-emittance muon collider workshop (6-10 February 2006)

In February 2006, Muons, Inc., and Fermilab sponsored a workshop to evaluate the feasibility and consequences of a muon collider with emittances much lower than previously envisioned. The workshop was held at Fermilab over the week of 6-10 February 2006. It was attended by 65 people representing 16 institutions from around the world

Cross section determination for the reaction K+p → K+pπ+π-π0 and K+π+π+π-n at 8.2 and 16 GeV/c

The cross sections for the reactions: (a) K+p → K+pπ+π-π+ and (b) K+p → K+π+π+π-n have been determined at 8.2 and 16 GeV/c with the following results: at 8.2 GeV/c: (a) 0.99 ± 0.07 mb, (b) 0.41 ± 0.04 mb; at 16 GeV/c: (a) 0.72 ± 0.05 mb, (b) 0.28 ± 0.05 mb. Using the available data at other energies, the cross-section dependence of these reactions on the incident momentum is discussed. © 1976.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

MANX, A 6-D Muon Cooling Demonstration Experiment

Most ionization cooling schemes now under consideration are based on using many large flasks of liquid hydrogen energy absorber. One important example is the proposed Muon Ionization Cooling Experiment (MICE), which has recently been approved to run at the Rutherford Appleton Laboratory (RAL). In the work reported here, a potential muon cooling demonstration experiment based on a continuous liquid energy absorber in a helical cooling channel (HCC) is discussed. The original HCC used a gaseous energy absorber for the engineering advantage of combining the energy absorption and RF energy regeneration in hydrogen-filled RF cavities. In the Muon And Neutrino eXperiment (MANX) that is proposed here, a liquid-filled HCC is used without RF energy regeneration to achieve the largest possible cooling rate in six dimensions. In this case, the magnetic fields of the HCC must diminish as the muons lose momentum as they pass through the liquid energy absorber. The length of the MANX device is determined by the maximum momentum of the muon test beam and the maximum practical field that can be sustained at the magnet coils. We have studied a 3 meter-long HCC example that could be inserted between the MICE spectrometers at RAL

Tryekhchastichnyye konyechnyye sostoyaniya v K+p vzaimodyei{cyrillic, short}stviyakh pri 3.5 GeV/s.

The three-body final states of K+p at 3.5 GeV/c show large fractions of quasi-two-body processes, by abundant production of K*(892) and N *(1236). The K*(1400) is also observed in constructive interference with the N *(1236). The production and decay angular distributions of K*(892) are compared to the predictions of the peripheral models and to the results at 3 and 5 GeV/c. In partieular, the agreement with the peripheral model with absorption, satisfactory at lower energy, tends to deteriorate as the energy increases. © 1967 Società Italiana di Fisica.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Inclusive K0, K*+(892) and π± production in K+p interactions at 8.2 and 16 GeV/c and quark models in the central and fragmentation regions

Results are presented on the production of K0, K*+(892) and π± in the interaction K+p → K0 + π± + anything at 8.2 and 16 GeV/c. The π± forward and backward dσ dx distributions are of the form exp (-Ax). It is shown that the forward and backward values of A in a quark-quark rest frame change after subtraction of the contributions due to the resonances produced. A comparison is made of dσ dx inclusive cross sections for K0's and K*+(892) with the predictions of a quark model in the fragmentation region. The experimental cross section matches the theoretical predictions for K0's but disagree with those for K*+(892). © 1975.SCOPUS: ar.jinfo:eu-repo/semantics/publishe

Inclusive Δ++ production in K+p interactions at 8.2 and 16 GeV/c

The reaction K+p→Δ++(1236)+ anything is studied at beam momenta 8.2 and 16 GeV/c and compared with other Δ++ producing reactions. We find that the low-mass Δ++π- enhancement affects the shapes of Δ++ inclusive distributions. The triple-Regge formula is found to be consistent with the data. Dual properties of this formula are successfully tested. © 1976.SCOPUS: ar.jinfo:eu-repo/semantics/publishe