An integrated luminosity of 410 pb-1, corresponding to ��� 17 million of �� events, has been analyzed to measure the �� mass using the decay �� ��� ����. The measurement is insensitive to the calorimeter energy calibration and the systematic error on the measurement is dominated by the uniformity of the detector response. As a cross check of the method the ��0 mass from the decay �� ��� ��0, ��0 ��� has been measured and it is in agreement with the most accurate previous determinations. The result obtained is m �� = 547.873��0.007stat. ��0.031syst. MeV, that is today best measurement of the �� mass.

Measurement of the eta mass at KLOE

AMBROSINO, FABIO;CAPUSSELA, TIZIANA;MASSAROTTI, PAOLO;PERFETTO, FRANCESCO;
2007

Abstract

An integrated luminosity of 410 pb-1, corresponding to ��� 17 million of �� events, has been analyzed to measure the �� mass using the decay �� ��� ����. The measurement is insensitive to the calorimeter energy calibration and the systematic error on the measurement is dominated by the uniformity of the detector response. As a cross check of the method the ��0 mass from the decay �� ��� ��0, ��0 ��� has been measured and it is in agreement with the most accurate previous determinations. The result obtained is m �� = 547.873��0.007stat. ��0.031syst. MeV, that is today best measurement of the �� mass.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/597910
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