Search for the Pentaquark + via the p K X Reaction at J-PARC (Hardcover, 1st ed. 2016)

This theses reports on an experimental search for an exotic hadron, +(1540) pentaquark, which is a genuine exotic hadron with a five-quark system of uuddsbar. The results of this book support that the existence of + was strongly constrained. The + pentaquark was searched for via the - p K- X reaction using a beam momentum of 2.01 GeV/c at the J-PARC hadron experimental facility, taking advantage of high-statistics and high-resolution compared with previous experiments, some of which claimed the evidence of +. In order to realize a good missing-mass resolution of 2 MeV, the beam spectrometer and superconducting kaon spectrometer were constructed. No clear peak was observed in the missing mass spectrum of the - p K- X reaction, and the upper limit of the production cross section was found to be less than 0.28 b/sr at the 90% confidence level in a mass region of 1500-1560 MeV/c2. This upper limit is an order of magnitude smaller than that of the previous KEK experiment. Compared with a theoretical calculation using the effective Lagrangian approach, the decay width of + was evaluated. The upper limits on the decay width were estimated to be 0.36 and 1.9 MeV for the + spin-parity of 1/2+ and 1/2-, respectively. These are quite small for a width of ordinary hadron resonances, and the existence of + was strongly constrained and is doubtful.

General

Imprint:	Springer Verlag, Singapore
Country of origin:	Singapore
Series:	Springer Theses
Release date:	March 2016
First published:	2016
Authors:	Manabu Moritsu
Dimensions:	235 x 155 x 10mm (L x W x T)
Format:	Hardcover
Pages:	123
Edition:	1st ed. 2016
ISBN-13:	978-981-10-0010-2
Categories:	Books > Science & Mathematics > Science: general issues > Scientific standards Books > Science & Mathematics > Physics > Atomic & molecular physics
LSN:	981-10-0010-7
Barcode:	9789811000102

Is the information for this product incomplete, wrong or inappropriate? Let us know about it.

Does this product have an incorrect or missing image? Send us a new image.

Is this product missing categories? Add more categories.

Review This Product

No reviews yet - be the first to create one!