Yes. Chebychev's inequality gives an estimate for how often a deviation this large this should happen, and it seems to be perfectly within the realms of probability, in fact it seems to be expected, and even two such deviations would not be strange.
Gerhard might want to correct me here, though...
Cheers,
Rob
------------------------------------------ Robert Lambert FOM-VU-NIKHEF-Bfys LHCb Email: rob.lambert@cern.ch ------------------------------------------ Nikhef N251 Tel: +31 20 592 2131 Fax: +31 20 592 5155 ------------------------------------------ CERN, 13-1-018 Tel: +41 22 767 4024 Fax: +41 22 766 8109 ------------------------------------------ ________________________________ From: Marcel Merk [marcel.merk@nikhef.nl] Sent: 02 July 2013 10:51 To: Rob Lambert Cc: bfys-physics@nikhef.nl Subject: Re: [Bfys-physics] B->K*mumu paper
Hi Rob, Let me just clarify: you question the claim of 0.5%, is that correct? just to make sure I understand which point you comment on. cheers, - Marcel
On 2 July 2013 10:06, Rob Lambert <Rob.Lambert@cern.chmailto:Rob.Lambert@cern.ch> wrote: Erm, just some statistical queries.. what about chebychev's inequality:
http://en.wikipedia.org/wiki/Chebyshev%27s_inequality
"No more than 1/k^{2} of the distribution's values can be more than k standard deviations away from the mean"
In this case it is 1/(3.7*3.7) which is 7%, and 24*7% is 1.75, so no more than 1.75 of the observables should be this far away. One deviation this large is perfectly expected from Chebychev's inequality.
Thanks,
Rob
------------------------------------------ Robert Lambert FOM-VU-NIKHEF-Bfys LHCb Email: rob.lambert@cern.chmailto:rob.lambert@cern.ch ------------------------------------------ Nikhef N251 Tel: +31 20 592 2131tel:%2B31%2020%20592%202131 Fax: +31 20 592 5155tel:%2B31%2020%20592%205155 ------------------------------------------ CERN, 13-1-018 Tel: +41 22 767 4024tel:%2B41%2022%20767%204024 Fax: +41 22 766 8109tel:%2B41%2022%20766%208109 ------------------------------------------ ________________________________ From: bfys-physics-bounces@nikhef.nlmailto:bfys-physics-bounces@nikhef.nl [bfys-physics-bounces@nikhef.nlmailto:bfys-physics-bounces@nikhef.nl] on behalf of Marcel Merk [marcel.merk@nikhef.nlmailto:marcel.merk@nikhef.nl] Sent: 01 July 2013 18:01 To: bfys-physics@nikhef.nlmailto:bfys-physics@nikhef.nl Subject: [Bfys-physics] B->K*mumu paper
Dear bfys-physics friend, This is to let you know that I collect comments to the paper below. To stimulate you to read it: we claim that the probability that the measurement is consistent with the Standard Model is only 0.5%. A local discrepancy of 3.7 sigma is observed.
LHCb PAPER-2013-037: "Measurement of form factor independent observables in the decay $B^0\to K^{*0}\mu^+\mu^-$" Link : https://cds.cern.ch/record/1557918 Deadline : 09-Jul-2013
best regards, - Marcel
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