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It is well known that investigating QCD at finite density by standard MonteCarlo methods is extremely difficult due to the sign problem. Some years ago,the complex Langevin method with gauge cooling was shown to work at hightemperature, i.e., in the deconfined phase. The same method was also applied toQCD in the so-called heavy dense limit in the whole temperature region. In thispaper we attempt to apply this method to the large $\mu/T$ regime with moderatequark mass using four-flavor staggered fermions on a $4^3\times 8$ lattice.While a straightforward application faces with the singular-drift problem,which spoils the validity of the method, we overcome this problem by thedeformation technique proposed earlier. Explicit results for the quark numberdensity and the chiral condensate obtained in this way for $3.2\leq \mu/T\leq5.6$ are compared with the results for the phase-quenched model obtained by thestandard rational hybrid Monte Carlo calculation. This reveals a cleardifference, which is qualitatively consistent with the Silver Blaze phenomenon.

Complex Langevin calculations in finite density QCD at large $\mu/T$ with the deformation technique