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B -> K pi and related decays are studied in the heavy quark limit of QCDusing the soft collinear effective theory (SCET). We focus on results thatfollow solely from integrating out the scale mb, without expanding theamplitudes for the physics at smaller scales such as alphas(sqrt{EpiLambdaQCD}). The reduction in the number of hadronic parameters in SCET leadsto multiple predictions without the need of SU(3). We find that theCP-asymmetry in $B^-\to pi^0 K^-$ should have a similar magnitude and the samesign as the well measured asymmetry in $\bar B^0 \to\pi^+ K^-$. Our predictionfor Br(K^+\pi^-) exceeds the current experimental value at the 2 sigma level.We also use our results to determine the corrections to the Lipkin andCP-asymmetry sum rules in the standard model and find them to be quite small,thus sharpening their utility as a tool to look for new physics.Comment: Added one relation for B->KK decays in the SU(3) limit. Added some  references. Results and conclusions unchanged. 23 pages, 4 figure

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Soft collinear effective theory analysis of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>K</mml:mi><mml:mi>π</mml:mi></mml:math>,<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>→</mml:mo><mml:mi>K</mml:mi><mml:mover accent="true"><mml:mi>K</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>, and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi…

Soft collinear effective theory analysis ofB→Kπ,B→KK¯, and